Adding upstream version 1:2.43.0.upstream/1%2.43.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2380 insertions, 0 deletions

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
new file mode 100755
index 0000000..b443626
--- /dev/null
+++ b/t/t4015-diff-whitespace.sh
@@ -0,0 +1,2380 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Johannes E. Schindelin
+# Copyright (c) 2023 Google LLC
+
+test_description='Test special whitespace in diff engine.
+
+'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-diff.sh
+
+for opt_res in --patch --quiet -s --stat --shortstat --dirstat=lines \
+	       --raw! --name-only! --name-status!
+do
+	opts=${opt_res%!} expect_failure=
+	test "$opts" = "$opt_res" ||
+		expect_failure="test_expect_code 1"
+
+	test_expect_success "status with $opts (different)" '
+		echo foo >x &&
+		git add x &&
+		echo bar >x &&
+		test_expect_code 1 git diff -w $opts --exit-code x
+	'
+
+	test_expect_success POSIXPERM "status with $opts (mode differs)" '
+		test_when_finished "git update-index --chmod=-x x" &&
+		echo foo >x &&
+		git add x &&
+		git update-index --chmod=+x x &&
+		test_expect_code 1 git diff -w $opts --exit-code x
+	'
+
+	test_expect_success "status with $opts (removing an empty file)" '
+		: >x &&
+		git add x &&
+		rm x &&
+		test_expect_code 1 git diff -w $opts --exit-code -- x
+	'
+
+	test_expect_success "status with $opts (different but equivalent)" '
+		echo foo >x &&
+		git add x &&
+		echo " foo" >x &&
+		$expect_failure git diff -w $opts --exit-code x
+	'
+done
+
+test_expect_success "Ray Lehtiniemi's example" '
+	cat <<-\EOF >x &&
+	do {
+	   nothing;
+	} while (0);
+	EOF
+	git update-index --add x &&
+	old_hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$old_hash_x") &&
+
+	cat <<-\EOF >x &&
+	do
+	{
+	   nothing;
+	}
+	while (0);
+	EOF
+	new_hash_x=$(git hash-object x) &&
+	after=$(git rev-parse --short "$new_hash_x") &&
+
+	cat <<-EOF >expect &&
+	diff --git a/x b/x
+	index $before..$after 100644
+	--- a/x
+	+++ b/x
+	@@ -1,3 +1,5 @@
+	-do {
+	+do
+	+{
+	    nothing;
+	-} while (0);
+	+}
+	+while (0);
+	EOF
+
+	git diff >out &&
+	test_cmp expect out &&
+
+	git diff -w >out &&
+	test_cmp expect out &&
+
+	git diff -b >out &&
+	test_cmp expect out
+'
+
+test_expect_success 'another test, without options' '
+	tr Q "\015" <<-\EOF >x &&
+	whitespace at beginning
+	whitespace change
+	whitespace in the middle
+	whitespace at end
+	unchanged line
+	CR at endQ
+	EOF
+
+	git update-index x &&
+	old_hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$old_hash_x") &&
+
+	tr "_" " " <<-\EOF >x &&
+	_	whitespace at beginning
+	whitespace 	 change
+	white space in the middle
+	whitespace at end__
+	unchanged line
+	CR at end
+	EOF
+	new_hash_x=$(git hash-object x) &&
+	after=$(git rev-parse --short "$new_hash_x") &&
+
+	tr "Q_" "\015 " <<-EOF >expect &&
+	diff --git a/x b/x
+	index $before..$after 100644
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,6 @@
+	-whitespace at beginning
+	-whitespace change
+	-whitespace in the middle
+	-whitespace at end
+	+ 	whitespace at beginning
+	+whitespace 	 change
+	+white space in the middle
+	+whitespace at end__
+	 unchanged line
+	-CR at endQ
+	+CR at end
+	EOF
+
+	git diff >out &&
+	test_cmp expect out &&
+
+	git diff -w >out &&
+	test_must_be_empty out &&
+
+	git diff -w -b >out &&
+	test_must_be_empty out &&
+
+	git diff -w --ignore-space-at-eol >out &&
+	test_must_be_empty out &&
+
+	git diff -w -b --ignore-space-at-eol >out &&
+	test_must_be_empty out &&
+
+	git diff -w --ignore-cr-at-eol >out &&
+	test_must_be_empty out &&
+
+	tr "Q_" "\015 " <<-EOF >expect &&
+	diff --git a/x b/x
+	index $before..$after 100644
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,6 @@
+	-whitespace at beginning
+	+_	whitespace at beginning
+	 whitespace 	 change
+	-whitespace in the middle
+	+white space in the middle
+	 whitespace at end__
+	 unchanged line
+	 CR at end
+	EOF
+	git diff -b >out &&
+	test_cmp expect out &&
+
+	git diff -b --ignore-space-at-eol >out &&
+	test_cmp expect out &&
+
+	git diff -b --ignore-cr-at-eol >out &&
+	test_cmp expect out &&
+
+	tr "Q_" "\015 " <<-EOF >expect &&
+	diff --git a/x b/x
+	index $before..$after 100644
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,6 @@
+	-whitespace at beginning
+	-whitespace change
+	-whitespace in the middle
+	+_	whitespace at beginning
+	+whitespace 	 change
+	+white space in the middle
+	 whitespace at end__
+	 unchanged line
+	 CR at end
+	EOF
+	git diff --ignore-space-at-eol >out &&
+	test_cmp expect out &&
+
+	git diff --ignore-space-at-eol --ignore-cr-at-eol >out &&
+	test_cmp expect out &&
+
+	tr "Q_" "\015 " <<-EOF >expect &&
+	diff --git a/x b/x
+	index_$before..$after 100644
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,6 @@
+	-whitespace at beginning
+	-whitespace change
+	-whitespace in the middle
+	-whitespace at end
+	+_	whitespace at beginning
+	+whitespace_	_change
+	+white space in the middle
+	+whitespace at end__
+	 unchanged line
+	 CR at end
+	EOF
+	git diff --ignore-cr-at-eol >out &&
+	test_cmp expect out
+'
+
+test_expect_success 'ignore-blank-lines: only new lines' '
+	test_seq 5 >x &&
+	git update-index x &&
+	test_seq 5 | sed "/3/i\\
+" >x &&
+	git diff --ignore-blank-lines >out &&
+	test_must_be_empty out
+'
+
+test_expect_success 'ignore-blank-lines: only new lines with space' '
+	test_seq 5 >x &&
+	git update-index x &&
+	test_seq 5 | sed "/3/i\\
+ " >x &&
+	git diff -w --ignore-blank-lines >out &&
+	test_must_be_empty out
+'
+
+test_expect_success 'ignore-blank-lines: after change' '
+	cat <<-\EOF >x &&
+	1
+	2
+
+	3
+	4
+	5
+
+	6
+	7
+	EOF
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+
+	1
+	2
+	3
+	4
+	5
+	6
+
+	7
+	EOF
+	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,7 @@
+	+change
+	+
+	 1
+	 2
+	-
+	 3
+	 4
+	 5
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: before change' '
+	cat <<-\EOF >x &&
+	1
+	2
+
+	3
+	4
+	5
+	6
+	7
+	EOF
+	git update-index x &&
+	cat <<-\EOF >x &&
+
+	1
+	2
+	3
+	4
+	5
+
+	6
+	7
+	change
+	EOF
+	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -4,5 +4,7 @@
+	 3
+	 4
+	 5
+	+
+	 6
+	 7
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: between changes' '
+	cat <<-\EOF >x &&
+	1
+	2
+	3
+	4
+	5
+
+
+	6
+	7
+	8
+	9
+	10
+	EOF
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+	1
+	2
+
+	3
+	4
+	5
+	6
+	7
+	8
+
+	9
+	10
+	change
+	EOF
+	git diff --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,5 +1,7 @@
+	+change
+	 1
+	 2
+	+
+	 3
+	 4
+	 5
+	@@ -8,5 +8,7 @@
+	 6
+	 7
+	 8
+	+
+	 9
+	 10
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' '
+	test_seq 10 >x &&
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+	1
+	2
+
+	3
+	4
+	5
+
+	6
+	7
+	8
+	9
+
+	10
+	change
+	EOF
+	git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,10 +1,15 @@
+	+change
+	 1
+	 2
+	+
+	 3
+	 4
+	 5
+	+
+	 6
+	 7
+	 8
+	 9
+	+
+	 10
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: scattered spaces' '
+	test_seq 10 >x &&
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+	1
+	2
+	3
+
+	4
+
+	5
+
+	6
+
+
+	7
+
+	8
+	9
+	10
+	change
+	EOF
+	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,3 +1,4 @@
+	+change
+	 1
+	 2
+	 3
+	@@ -8,3 +15,4 @@
+	 8
+	 9
+	 10
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: spaces coalesce' '
+	test_seq 6 >x &&
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+	1
+	2
+	3
+
+	4
+
+	5
+
+	6
+	change
+	EOF
+	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,6 +1,11 @@
+	+change
+	 1
+	 2
+	 3
+	+
+	 4
+	+
+	 5
+	+
+	 6
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'ignore-blank-lines: mix changes and blank lines' '
+	test_seq 16 >x &&
+	git update-index x &&
+	cat <<-\EOF >x &&
+	change
+	1
+	2
+
+	3
+	4
+	5
+	change
+	6
+	7
+	8
+
+	9
+	10
+	11
+	change
+	12
+	13
+	14
+
+	15
+	16
+	change
+	EOF
+	git diff --ignore-blank-lines >out.tmp &&
+	cat <<-\EOF >expected &&
+	diff --git a/x b/x
+	--- a/x
+	+++ b/x
+	@@ -1,8 +1,11 @@
+	+change
+	 1
+	 2
+	+
+	 3
+	 4
+	 5
+	+change
+	 6
+	 7
+	 8
+	@@ -9,8 +13,11 @@
+	 9
+	 10
+	 11
+	+change
+	 12
+	 13
+	 14
+	+
+	 15
+	 16
+	+change
+	EOF
+	compare_diff_patch expected out.tmp
+'
+
+test_expect_success 'check mixed spaces and tabs in indent' '
+	# This is indented with SP HT SP.
+	echo " 	 foo();" >x &&
+	test_must_fail git diff --check >check &&
+	grep "space before tab in indent" check
+'
+
+test_expect_success 'check mixed tabs and spaces in indent' '
+	# This is indented with HT SP HT.
+	echo "	 	foo();" >x &&
+	test_must_fail git diff --check >check &&
+	grep "space before tab in indent" check
+'
+
+test_expect_success 'check with no whitespace errors' '
+	git commit -m "snapshot" &&
+	echo "foo();" >x &&
+	git diff --check
+'
+
+test_expect_success 'check with trailing whitespace' '
+	echo "foo(); " >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check with space before tab in indent' '
+	# indent has space followed by hard tab
+	echo " 	foo();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success '--check and --exit-code are not exclusive' '
+	git checkout x &&
+	git diff --check --exit-code
+'
+
+test_expect_success '--check and --quiet are not exclusive' '
+	git diff --check --quiet
+'
+
+test_expect_success '-w and --exit-code interact sensibly' '
+	test_when_finished "git checkout x" &&
+	{
+		test_seq 15 &&
+		echo " 16"
+	} >x &&
+	test_must_fail git diff --exit-code &&
+	git diff -w >actual &&
+	test_must_be_empty actual &&
+	git diff -w --exit-code
+'
+
+test_expect_success '-I and --exit-code interact sensibly' '
+	test_when_finished "git checkout x" &&
+	{
+		test_seq 15 &&
+		echo " 16"
+	} >x &&
+	test_must_fail git diff --exit-code &&
+	git diff -I. >actual &&
+	test_must_be_empty actual &&
+	git diff -I. --exit-code
+'
+
+test_expect_success 'check staged with no whitespace errors' '
+	echo "foo();" >x &&
+	git add x &&
+	git diff --cached --check
+'
+
+test_expect_success 'check staged with trailing whitespace' '
+	echo "foo(); " >x &&
+	git add x &&
+	test_must_fail git diff --cached --check
+'
+
+test_expect_success 'check staged with space before tab in indent' '
+	# indent has space followed by hard tab
+	echo " 	foo();" >x &&
+	git add x &&
+	test_must_fail git diff --cached --check
+'
+
+test_expect_success 'check with no whitespace errors (diff-index)' '
+	echo "foo();" >x &&
+	git add x &&
+	git diff-index --check HEAD
+'
+
+test_expect_success 'check with trailing whitespace (diff-index)' '
+	echo "foo(); " >x &&
+	git add x &&
+	test_must_fail git diff-index --check HEAD
+'
+
+test_expect_success 'check with space before tab in indent (diff-index)' '
+	# indent has space followed by hard tab
+	echo " 	foo();" >x &&
+	git add x &&
+	test_must_fail git diff-index --check HEAD
+'
+
+test_expect_success 'check staged with no whitespace errors (diff-index)' '
+	echo "foo();" >x &&
+	git add x &&
+	git diff-index --cached --check HEAD
+'
+
+test_expect_success 'check staged with trailing whitespace (diff-index)' '
+	echo "foo(); " >x &&
+	git add x &&
+	test_must_fail git diff-index --cached --check HEAD
+'
+
+test_expect_success 'check staged with space before tab in indent (diff-index)' '
+	# indent has space followed by hard tab
+	echo " 	foo();" >x &&
+	git add x &&
+	test_must_fail git diff-index --cached --check HEAD
+'
+
+test_expect_success 'check with no whitespace errors (diff-tree)' '
+	echo "foo();" >x &&
+	git commit -m "new commit" x &&
+	git diff-tree --check HEAD^ HEAD
+'
+
+test_expect_success 'check with trailing whitespace (diff-tree)' '
+	echo "foo(); " >x &&
+	git commit -m "another commit" x &&
+	test_must_fail git diff-tree --check HEAD^ HEAD
+'
+
+test_expect_success 'check with space before tab in indent (diff-tree)' '
+	# indent has space followed by hard tab
+	echo " 	foo();" >x &&
+	git commit -m "yet another" x &&
+	test_must_fail git diff-tree --check HEAD^ HEAD
+'
+
+test_expect_success 'check with ignored trailing whitespace attr (diff-tree)' '
+	test_when_finished "git reset --hard HEAD^" &&
+
+	# create a whitespace error that should be ignored
+	echo "* -whitespace" >.gitattributes &&
+	git add .gitattributes &&
+	echo "foo(); " >x &&
+	git add x &&
+	git commit -m "add trailing space" &&
+
+	# with a worktree diff-tree ignores the whitespace error
+	git diff-tree --root --check HEAD &&
+
+	# without a worktree diff-tree still ignores the whitespace error
+	git -C .git diff-tree --root --check HEAD
+'
+
+test_expect_success 'check trailing whitespace (trailing-space: off)' '
+	git config core.whitespace "-trailing-space" &&
+	echo "foo ();   " >x &&
+	git diff --check
+'
+
+test_expect_success 'check trailing whitespace (trailing-space: on)' '
+	git config core.whitespace "trailing-space" &&
+	echo "foo ();   " >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check space before tab in indent (space-before-tab: off)' '
+	# indent contains space followed by HT
+	git config core.whitespace "-space-before-tab" &&
+	echo " 	foo ();" >x &&
+	git diff --check
+'
+
+test_expect_success 'check space before tab in indent (space-before-tab: on)' '
+	# indent contains space followed by HT
+	git config core.whitespace "space-before-tab" &&
+	echo " 	foo ();   " >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check spaces as indentation (indent-with-non-tab: off)' '
+	git config core.whitespace "-indent-with-non-tab" &&
+	echo "        foo ();" >x &&
+	git diff --check
+'
+
+test_expect_success 'check spaces as indentation (indent-with-non-tab: on)' '
+	git config core.whitespace "indent-with-non-tab" &&
+	echo "        foo ();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'ditto, but tabwidth=9' '
+	git config core.whitespace "indent-with-non-tab,tabwidth=9" &&
+	git diff --check
+'
+
+test_expect_success 'check tabs and spaces as indentation (indent-with-non-tab: on)' '
+	git config core.whitespace "indent-with-non-tab" &&
+	echo "	                foo ();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'ditto, but tabwidth=10' '
+	git config core.whitespace "indent-with-non-tab,tabwidth=10" &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'ditto, but tabwidth=20' '
+	git config core.whitespace "indent-with-non-tab,tabwidth=20" &&
+	git diff --check
+'
+
+test_expect_success 'check tabs as indentation (tab-in-indent: off)' '
+	git config core.whitespace "-tab-in-indent" &&
+	echo "	foo ();" >x &&
+	git diff --check
+'
+
+test_expect_success 'check tabs as indentation (tab-in-indent: on)' '
+	git config core.whitespace "tab-in-indent" &&
+	echo "	foo ();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check tabs and spaces as indentation (tab-in-indent: on)' '
+	git config core.whitespace "tab-in-indent" &&
+	echo "	                foo ();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'ditto, but tabwidth=1 (must be irrelevant)' '
+	git config core.whitespace "tab-in-indent,tabwidth=1" &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check tab-in-indent and indent-with-non-tab conflict' '
+	git config core.whitespace "tab-in-indent,indent-with-non-tab" &&
+	echo "foo ();" >x &&
+	test_must_fail git diff --check
+'
+
+test_expect_success 'check tab-in-indent excluded from wildcard whitespace attribute' '
+	git config --unset core.whitespace &&
+	echo "x whitespace" >.gitattributes &&
+	echo "	  foo ();" >x &&
+	git diff --check &&
+	rm -f .gitattributes
+'
+
+test_expect_success 'line numbers in --check output are correct' '
+	echo "" >x &&
+	echo "foo(); " >>x &&
+	test_must_fail git diff --check >check &&
+	grep "x:2:" check
+'
+
+test_expect_success 'checkdiff detects new trailing blank lines (1)' '
+	echo "foo();" >x &&
+	echo "" >>x &&
+	test_must_fail git diff --check >check &&
+	grep "new blank line" check
+'
+
+test_expect_success 'checkdiff detects new trailing blank lines (2)' '
+	test_write_lines a b "" "" >x &&
+	git add x &&
+	test_write_lines a "" "" "" "" >x &&
+	test_must_fail git diff --check >check &&
+	grep "new blank line" check
+'
+
+test_expect_success 'checkdiff allows new blank lines' '
+	git checkout x &&
+	mv x y &&
+	(
+		echo "/* This is new */" &&
+		echo "" &&
+		cat y
+	) >x &&
+	git diff --check
+'
+
+test_expect_success 'whitespace-only changes not reported (diff)' '
+	git reset --hard &&
+	echo >x "hello world" &&
+	git add x &&
+	git commit -m "hello 1" &&
+	echo >x "hello  world" &&
+	git diff -b >actual &&
+	test_must_be_empty actual
+'
+
+test_expect_success 'whitespace-only changes not reported (diffstat)' '
+	# reuse state from previous test
+	git diff --stat -b >actual &&
+	test_must_be_empty actual
+'
+
+test_expect_success 'whitespace changes with modification reported (diffstat)' '
+	git reset --hard &&
+	echo >x "hello  world" &&
+	git update-index --chmod=+x x &&
+	git diff --stat --cached -b >actual &&
+	cat <<-EOF >expect &&
+	 x | 0
+	 1 file changed, 0 insertions(+), 0 deletions(-)
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'whitespace-only changes reported across renames (diffstat)' '
+	git reset --hard &&
+	for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i" || return 1; done >x &&
+	git add x &&
+	git commit -m "base" &&
+	sed -e "5s/^/ /" x >z &&
+	git rm x &&
+	git add z &&
+	git diff -w -M --cached --stat >actual &&
+	cat <<-EOF >expect &&
+	 x => z | 0
+	 1 file changed, 0 insertions(+), 0 deletions(-)
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'whitespace-only changes reported across renames' '
+	git reset --hard HEAD~1 &&
+	for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i" || return 1; done >x &&
+	git add x &&
+	hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$hash_x") &&
+	git commit -m "base" &&
+	sed -e "5s/^/ /" x >z &&
+	git rm x &&
+	git add z &&
+	hash_z=$(git hash-object z) &&
+	after=$(git rev-parse --short "$hash_z") &&
+	git diff -w -M --cached >actual.raw &&
+	sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" actual.raw >actual &&
+	cat <<-EOF >expect &&
+	diff --git a/x b/z
+	similarity index NUM%
+	rename from x
+	rename to z
+	index $before..$after 100644
+	EOF
+	test_cmp expect actual
+'
+
+cat >expected <<\EOF
+diff --git a/empty b/void
+similarity index 100%
+rename from empty
+rename to void
+EOF
+
+test_expect_success 'rename empty' '
+	git reset --hard &&
+	>empty &&
+	git add empty &&
+	git commit -m empty &&
+	git mv empty void &&
+	git diff -w --cached -M >current &&
+	test_cmp expected current
+'
+
+test_expect_success 'combined diff with autocrlf conversion' '
+
+	git reset --hard &&
+	test_commit "one side" x hello one-side &&
+	git checkout HEAD^ &&
+	echo >x goodbye &&
+	git commit -m "the other side" x &&
+	git config core.autocrlf true &&
+	test_must_fail git merge one-side >actual &&
+	test_grep "Automatic merge failed" actual &&
+
+	git diff >actual.raw &&
+	sed -e "1,/^@@@/d" actual.raw >actual &&
+	! grep "^-" actual
+
+'
+
+# Start testing the colored format for whitespace checks
+
+test_expect_success 'setup diff colors' '
+	git config color.diff.plain normal &&
+	git config color.diff.meta bold &&
+	git config color.diff.frag cyan &&
+	git config color.diff.func normal &&
+	git config color.diff.old red &&
+	git config color.diff.new green &&
+	git config color.diff.commit yellow &&
+	git config color.diff.whitespace blue &&
+
+	git config core.autocrlf false
+'
+
+test_expect_success 'diff that introduces a line with only tabs' '
+	git config core.whitespace blank-at-eol &&
+	git reset --hard &&
+	echo "test" >x &&
+	old_hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$old_hash_x") &&
+	git commit -m "initial" x &&
+	echo "{NTN}" | tr "NT" "\n\t" >>x &&
+	new_hash_x=$(git hash-object x) &&
+	after=$(git rev-parse --short "$new_hash_x") &&
+	git diff --color >current.raw &&
+	test_decode_color <current.raw >current &&
+
+	cat >expected <<-EOF &&
+	<BOLD>diff --git a/x b/x<RESET>
+	<BOLD>index $before..$after 100644<RESET>
+	<BOLD>--- a/x<RESET>
+	<BOLD>+++ b/x<RESET>
+	<CYAN>@@ -1 +1,4 @@<RESET>
+	 test<RESET>
+	<GREEN>+<RESET><GREEN>{<RESET>
+	<GREEN>+<RESET><BLUE>	<RESET>
+	<GREEN>+<RESET><GREEN>}<RESET>
+	EOF
+
+	test_cmp expected current
+'
+
+test_expect_success 'diff that introduces and removes ws breakages' '
+	git reset --hard &&
+	{
+		echo "0. blank-at-eol " &&
+		echo "1. blank-at-eol "
+	} >x &&
+	old_hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$old_hash_x") &&
+	git commit -a --allow-empty -m preimage &&
+	{
+		echo "0. blank-at-eol " &&
+		echo "1. still-blank-at-eol " &&
+		echo "2. and a new line "
+	} >x &&
+	new_hash_x=$(git hash-object x) &&
+	after=$(git rev-parse --short "$new_hash_x") &&
+
+	git diff --color >current.raw &&
+	test_decode_color <current.raw >current &&
+
+	cat >expected <<-EOF &&
+	<BOLD>diff --git a/x b/x<RESET>
+	<BOLD>index $before..$after 100644<RESET>
+	<BOLD>--- a/x<RESET>
+	<BOLD>+++ b/x<RESET>
+	<CYAN>@@ -1,2 +1,3 @@<RESET>
+	 0. blank-at-eol <RESET>
+	<RED>-1. blank-at-eol <RESET>
+	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
+	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
+	EOF
+
+	test_cmp expected current
+'
+
+test_expect_success 'ws-error-highlight test setup' '
+
+	git reset --hard &&
+	{
+		echo "0. blank-at-eol " &&
+		echo "1. blank-at-eol "
+	} >x &&
+	old_hash_x=$(git hash-object x) &&
+	before=$(git rev-parse --short "$old_hash_x") &&
+	git commit -a --allow-empty -m preimage &&
+	{
+		echo "0. blank-at-eol " &&
+		echo "1. still-blank-at-eol " &&
+		echo "2. and a new line "
+	} >x &&
+	new_hash_x=$(git hash-object x) &&
+	after=$(git rev-parse --short "$new_hash_x") &&
+
+	cat >expect.default-old <<-EOF &&
+	<BOLD>diff --git a/x b/x<RESET>
+	<BOLD>index $before..$after 100644<RESET>
+	<BOLD>--- a/x<RESET>
+	<BOLD>+++ b/x<RESET>
+	<CYAN>@@ -1,2 +1,3 @@<RESET>
+	 0. blank-at-eol <RESET>
+	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
+	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
+	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
+	EOF
+
+	cat >expect.all <<-EOF &&
+	<BOLD>diff --git a/x b/x<RESET>
+	<BOLD>index $before..$after 100644<RESET>
+	<BOLD>--- a/x<RESET>
+	<BOLD>+++ b/x<RESET>
+	<CYAN>@@ -1,2 +1,3 @@<RESET>
+	 <RESET>0. blank-at-eol<RESET><BLUE> <RESET>
+	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
+	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
+	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
+	EOF
+
+	cat >expect.none <<-EOF
+	<BOLD>diff --git a/x b/x<RESET>
+	<BOLD>index $before..$after 100644<RESET>
+	<BOLD>--- a/x<RESET>
+	<BOLD>+++ b/x<RESET>
+	<CYAN>@@ -1,2 +1,3 @@<RESET>
+	 0. blank-at-eol <RESET>
+	<RED>-1. blank-at-eol <RESET>
+	<GREEN>+1. still-blank-at-eol <RESET>
+	<GREEN>+2. and a new line <RESET>
+	EOF
+
+'
+
+test_expect_success 'test --ws-error-highlight option' '
+
+	git diff --color --ws-error-highlight=default,old >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.default-old current &&
+
+	git diff --color --ws-error-highlight=all >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.all current &&
+
+	git diff --color --ws-error-highlight=none >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.none current
+
+'
+
+test_expect_success 'test diff.wsErrorHighlight config' '
+
+	git -c diff.wsErrorHighlight=default,old diff --color >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.default-old current &&
+
+	git -c diff.wsErrorHighlight=all diff --color >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.all current &&
+
+	git -c diff.wsErrorHighlight=none diff --color >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.none current
+
+'
+
+test_expect_success 'option overrides diff.wsErrorHighlight' '
+
+	git -c diff.wsErrorHighlight=none \
+		diff --color --ws-error-highlight=default,old >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.default-old current &&
+
+	git -c diff.wsErrorHighlight=default \
+		diff --color --ws-error-highlight=all >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.all current &&
+
+	git -c diff.wsErrorHighlight=all \
+		diff --color --ws-error-highlight=none >current.raw &&
+	test_decode_color <current.raw >current &&
+	test_cmp expect.none current
+
+'
+
+test_expect_success 'detect moved code, complete file' '
+	git reset --hard &&
+	cat <<-\EOF >test.c &&
+	#include<stdio.h>
+	main()
+	{
+	printf("Hello World");
+	}
+	EOF
+	git add test.c &&
+	git commit -m "add main function" &&
+	file=$(git rev-parse --short HEAD:test.c) &&
+	git mv test.c main.c &&
+	test_config color.diff.oldMoved "normal red" &&
+	test_config color.diff.newMoved "normal green" &&
+	git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
+	test_decode_color <actual.raw >actual &&
+	cat >expected <<-EOF &&
+	<BOLD>diff --git a/main.c b/main.c<RESET>
+	<BOLD>new file mode 100644<RESET>
+	<BOLD>index 0000000..$file<RESET>
+	<BOLD>--- /dev/null<RESET>
+	<BOLD>+++ b/main.c<RESET>
+	<CYAN>@@ -0,0 +1,5 @@<RESET>
+	<BGREEN>+<RESET><BGREEN>#include<stdio.h><RESET>
+	<BGREEN>+<RESET><BGREEN>main()<RESET>
+	<BGREEN>+<RESET><BGREEN>{<RESET>
+	<BGREEN>+<RESET><BGREEN>printf("Hello World");<RESET>
+	<BGREEN>+<RESET><BGREEN>}<RESET>
+	<BOLD>diff --git a/test.c b/test.c<RESET>
+	<BOLD>deleted file mode 100644<RESET>
+	<BOLD>index $file..0000000<RESET>
+	<BOLD>--- a/test.c<RESET>
+	<BOLD>+++ /dev/null<RESET>
+	<CYAN>@@ -1,5 +0,0 @@<RESET>
+	<BRED>-#include<stdio.h><RESET>
+	<BRED>-main()<RESET>
+	<BRED>-{<RESET>
+	<BRED>-printf("Hello World");<RESET>
+	<BRED>-}<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'detect malicious moved code, inside file' '
+	test_config color.diff.oldMoved "normal red" &&
+	test_config color.diff.newMoved "normal green" &&
+	test_config color.diff.oldMovedAlternative "blue" &&
+	test_config color.diff.newMovedAlternative "yellow" &&
+	git reset --hard &&
+	cat <<-\EOF >main.c &&
+		#include<stdio.h>
+		int stuff()
+		{
+			printf("Hello ");
+			printf("World\n");
+		}
+
+		int secure_foo(struct user *u)
+		{
+			if (!u->is_allowed_foo)
+				return;
+			foo(u);
+		}
+
+		int main()
+		{
+			foo();
+		}
+	EOF
+	cat <<-\EOF >test.c &&
+		#include<stdio.h>
+		int bar()
+		{
+			printf("Hello World, but different\n");
+		}
+
+		int another_function()
+		{
+			bar();
+		}
+	EOF
+	git add main.c test.c &&
+	git commit -m "add main and test file" &&
+	before_main=$(git rev-parse --short HEAD:main.c) &&
+	before_test=$(git rev-parse --short HEAD:test.c) &&
+	cat <<-\EOF >main.c &&
+		#include<stdio.h>
+		int stuff()
+		{
+			printf("Hello ");
+			printf("World\n");
+		}
+
+		int main()
+		{
+			foo();
+		}
+	EOF
+	cat <<-\EOF >test.c &&
+		#include<stdio.h>
+		int bar()
+		{
+			printf("Hello World, but different\n");
+		}
+
+		int secure_foo(struct user *u)
+		{
+			foo(u);
+			if (!u->is_allowed_foo)
+				return;
+		}
+
+		int another_function()
+		{
+			bar();
+		}
+	EOF
+	hash_main=$(git hash-object main.c) &&
+	after_main=$(git rev-parse --short "$hash_main") &&
+	hash_test=$(git hash-object test.c) &&
+	after_test=$(git rev-parse --short "$hash_test") &&
+	git diff HEAD --no-renames --color-moved=zebra --color >actual.raw &&
+	test_decode_color <actual.raw >actual &&
+	cat <<-EOF >expected &&
+	<BOLD>diff --git a/main.c b/main.c<RESET>
+	<BOLD>index $before_main..$after_main 100644<RESET>
+	<BOLD>--- a/main.c<RESET>
+	<BOLD>+++ b/main.c<RESET>
+	<CYAN>@@ -5,13 +5,6 @@<RESET> <RESET>printf("Hello ");<RESET>
+	 printf("World\n");<RESET>
+	 }<RESET>
+	 <RESET>
+	<BRED>-int secure_foo(struct user *u)<RESET>
+	<BRED>-{<RESET>
+	<BLUE>-if (!u->is_allowed_foo)<RESET>
+	<BLUE>-return;<RESET>
+	<RED>-foo(u);<RESET>
+	<RED>-}<RESET>
+	<RED>-<RESET>
+	 int main()<RESET>
+	 {<RESET>
+	 foo();<RESET>
+	<BOLD>diff --git a/test.c b/test.c<RESET>
+	<BOLD>index $before_test..$after_test 100644<RESET>
+	<BOLD>--- a/test.c<RESET>
+	<BOLD>+++ b/test.c<RESET>
+	<CYAN>@@ -4,6 +4,13 @@<RESET> <RESET>int bar()<RESET>
+	 printf("Hello World, but different\n");<RESET>
+	 }<RESET>
+	 <RESET>
+	<BGREEN>+<RESET><BGREEN>int secure_foo(struct user *u)<RESET>
+	<BGREEN>+<RESET><BGREEN>{<RESET>
+	<GREEN>+<RESET><GREEN>foo(u);<RESET>
+	<BGREEN>+<RESET><BGREEN>if (!u->is_allowed_foo)<RESET>
+	<BGREEN>+<RESET><BGREEN>return;<RESET>
+	<GREEN>+<RESET><GREEN>}<RESET>
+	<GREEN>+<RESET>
+	 int another_function()<RESET>
+	 {<RESET>
+	 bar();<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'plain moved code, inside file' '
+	test_config color.diff.oldMoved "normal red" &&
+	test_config color.diff.newMoved "normal green" &&
+	test_config color.diff.oldMovedAlternative "blue" &&
+	test_config color.diff.newMovedAlternative "yellow" &&
+	# needs previous test as setup
+	git diff HEAD --no-renames --color-moved=plain --color >actual.raw &&
+	test_decode_color <actual.raw >actual &&
+	cat <<-EOF >expected &&
+	<BOLD>diff --git a/main.c b/main.c<RESET>
+	<BOLD>index $before_main..$after_main 100644<RESET>
+	<BOLD>--- a/main.c<RESET>
+	<BOLD>+++ b/main.c<RESET>
+	<CYAN>@@ -5,13 +5,6 @@<RESET> <RESET>printf("Hello ");<RESET>
+	 printf("World\n");<RESET>
+	 }<RESET>
+	 <RESET>
+	<BRED>-int secure_foo(struct user *u)<RESET>
+	<BRED>-{<RESET>
+	<BRED>-if (!u->is_allowed_foo)<RESET>
+	<BRED>-return;<RESET>
+	<BRED>-foo(u);<RESET>
+	<BRED>-}<RESET>
+	<BRED>-<RESET>
+	 int main()<RESET>
+	 {<RESET>
+	 foo();<RESET>
+	<BOLD>diff --git a/test.c b/test.c<RESET>
+	<BOLD>index $before_test..$after_test 100644<RESET>
+	<BOLD>--- a/test.c<RESET>
+	<BOLD>+++ b/test.c<RESET>
+	<CYAN>@@ -4,6 +4,13 @@<RESET> <RESET>int bar()<RESET>
+	 printf("Hello World, but different\n");<RESET>
+	 }<RESET>
+	 <RESET>
+	<BGREEN>+<RESET><BGREEN>int secure_foo(struct user *u)<RESET>
+	<BGREEN>+<RESET><BGREEN>{<RESET>
+	<BGREEN>+<RESET><BGREEN>foo(u);<RESET>
+	<BGREEN>+<RESET><BGREEN>if (!u->is_allowed_foo)<RESET>
+	<BGREEN>+<RESET><BGREEN>return;<RESET>
+	<BGREEN>+<RESET><BGREEN>}<RESET>
+	<BGREEN>+<RESET>
+	 int another_function()<RESET>
+	 {<RESET>
+	 bar();<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'detect blocks of moved code' '
+	git reset --hard &&
+	cat <<-\EOF >lines.txt &&
+		long line 1
+		long line 2
+		long line 3
+		line 4
+		line 5
+		line 6
+		line 7
+		line 8
+		line 9
+		line 10
+		line 11
+		line 12
+		line 13
+		long line 14
+		long line 15
+		long line 16
+	EOF
+	git add lines.txt &&
+	git commit -m "add poetry" &&
+	cat <<-\EOF >lines.txt &&
+		line 4
+		line 5
+		line 6
+		line 7
+		line 8
+		line 9
+		long line 1
+		long line 2
+		long line 3
+		long line 14
+		long line 15
+		long line 16
+		line 10
+		line 11
+		line 12
+		line 13
+	EOF
+	test_config color.diff.oldMoved "magenta" &&
+	test_config color.diff.newMoved "cyan" &&
+	test_config color.diff.oldMovedAlternative "blue" &&
+	test_config color.diff.newMovedAlternative "yellow" &&
+	test_config color.diff.oldMovedDimmed "normal magenta" &&
+	test_config color.diff.newMovedDimmed "normal cyan" &&
+	test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
+	test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
+	git diff HEAD --no-renames --color-moved=blocks --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,16 +1,16 @@<RESET>
+	<MAGENTA>-long line 1<RESET>
+	<MAGENTA>-long line 2<RESET>
+	<MAGENTA>-long line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	 line 6<RESET>
+	 line 7<RESET>
+	 line 8<RESET>
+	 line 9<RESET>
+	<CYAN>+<RESET><CYAN>long line 1<RESET>
+	<CYAN>+<RESET><CYAN>long line 2<RESET>
+	<CYAN>+<RESET><CYAN>long line 3<RESET>
+	<CYAN>+<RESET><CYAN>long line 14<RESET>
+	<CYAN>+<RESET><CYAN>long line 15<RESET>
+	<CYAN>+<RESET><CYAN>long line 16<RESET>
+	 line 10<RESET>
+	 line 11<RESET>
+	 line 12<RESET>
+	 line 13<RESET>
+	<MAGENTA>-long line 14<RESET>
+	<MAGENTA>-long line 15<RESET>
+	<MAGENTA>-long line 16<RESET>
+	EOF
+	test_cmp expected actual
+
+'
+
+test_expect_success 'detect permutations inside moved code -- dimmed-zebra' '
+	# reuse setup from test before!
+	test_config color.diff.oldMoved "magenta" &&
+	test_config color.diff.newMoved "cyan" &&
+	test_config color.diff.oldMovedAlternative "blue" &&
+	test_config color.diff.newMovedAlternative "yellow" &&
+	test_config color.diff.oldMovedDimmed "normal magenta" &&
+	test_config color.diff.newMovedDimmed "normal cyan" &&
+	test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
+	test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
+	git diff HEAD --no-renames --color-moved=dimmed-zebra --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,16 +1,16 @@<RESET>
+	<BMAGENTA>-long line 1<RESET>
+	<BMAGENTA>-long line 2<RESET>
+	<BMAGENTA>-long line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	 line 6<RESET>
+	 line 7<RESET>
+	 line 8<RESET>
+	 line 9<RESET>
+	<BCYAN>+<RESET><BCYAN>long line 1<RESET>
+	<BCYAN>+<RESET><BCYAN>long line 2<RESET>
+	<CYAN>+<RESET><CYAN>long line 3<RESET>
+	<YELLOW>+<RESET><YELLOW>long line 14<RESET>
+	<BYELLOW>+<RESET><BYELLOW>long line 15<RESET>
+	<BYELLOW>+<RESET><BYELLOW>long line 16<RESET>
+	 line 10<RESET>
+	 line 11<RESET>
+	 line 12<RESET>
+	 line 13<RESET>
+	<BMAGENTA>-long line 14<RESET>
+	<BMAGENTA>-long line 15<RESET>
+	<BMAGENTA>-long line 16<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'zebra alternate color is only used when necessary' '
+	cat >old.txt <<-\EOF &&
+	line 1A should be marked as oldMoved newMovedAlternate
+	line 1B should be marked as oldMoved newMovedAlternate
+	unchanged
+	line 2A should be marked as oldMoved newMovedAlternate
+	line 2B should be marked as oldMoved newMovedAlternate
+	line 3A should be marked as oldMovedAlternate newMoved
+	line 3B should be marked as oldMovedAlternate newMoved
+	unchanged
+	line 4A should be marked as oldMoved newMovedAlternate
+	line 4B should be marked as oldMoved newMovedAlternate
+	line 5A should be marked as oldMovedAlternate newMoved
+	line 5B should be marked as oldMovedAlternate newMoved
+	line 6A should be marked as oldMoved newMoved
+	line 6B should be marked as oldMoved newMoved
+	EOF
+	cat >new.txt <<-\EOF &&
+	  line 1A should be marked as oldMoved newMovedAlternate
+	  line 1B should be marked as oldMoved newMovedAlternate
+	unchanged
+	  line 3A should be marked as oldMovedAlternate newMoved
+	  line 3B should be marked as oldMovedAlternate newMoved
+	  line 2A should be marked as oldMoved newMovedAlternate
+	  line 2B should be marked as oldMoved newMovedAlternate
+	unchanged
+	  line 6A should be marked as oldMoved newMoved
+	  line 6B should be marked as oldMoved newMoved
+	    line 4A should be marked as oldMoved newMovedAlternate
+	    line 4B should be marked as oldMoved newMovedAlternate
+	  line 5A should be marked as oldMovedAlternate newMoved
+	  line 5B should be marked as oldMovedAlternate newMoved
+	EOF
+	test_expect_code 1 git diff --no-index --color --color-moved=zebra \
+		 --color-moved-ws=allow-indentation-change \
+		 old.txt new.txt >output &&
+	grep -v index output | test_decode_color >actual &&
+	cat >expected <<-\EOF &&
+	<BOLD>diff --git a/old.txt b/new.txt<RESET>
+	<BOLD>--- a/old.txt<RESET>
+	<BOLD>+++ b/new.txt<RESET>
+	<CYAN>@@ -1,14 +1,14 @@<RESET>
+	<BOLD;MAGENTA>-line 1A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;MAGENTA>-line 1B should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 1A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 1B should be marked as oldMoved newMovedAlternate<RESET>
+	 unchanged<RESET>
+	<BOLD;MAGENTA>-line 2A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;MAGENTA>-line 2B should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;BLUE>-line 3A should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;BLUE>-line 3B should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 3A should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 3B should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>  line 2A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>  line 2B should be marked as oldMoved newMovedAlternate<RESET>
+	 unchanged<RESET>
+	<BOLD;MAGENTA>-line 4A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;MAGENTA>-line 4B should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;BLUE>-line 5A should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;BLUE>-line 5B should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;MAGENTA>-line 6A should be marked as oldMoved newMoved<RESET>
+	<BOLD;MAGENTA>-line 6B should be marked as oldMoved newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 6A should be marked as oldMoved newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 6B should be marked as oldMoved newMoved<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>    line 4A should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>    line 4B should be marked as oldMoved newMovedAlternate<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 5A should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>  line 5B should be marked as oldMovedAlternate newMoved<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'short lines of opposite sign do not get marked as moved' '
+	cat >old.txt <<-\EOF &&
+	this line should be marked as moved
+	unchanged
+	unchanged
+	unchanged
+	unchanged
+	too short
+	this line should be marked as oldMoved newMoved
+	this line should be marked as oldMovedAlternate newMoved
+	unchanged 1
+	unchanged 2
+	unchanged 3
+	unchanged 4
+	this line should be marked as oldMoved newMoved/newMovedAlternate
+	EOF
+	cat >new.txt <<-\EOF &&
+	too short
+	unchanged
+	unchanged
+	this line should be marked as moved
+	too short
+	unchanged
+	unchanged
+	this line should be marked as oldMoved newMoved/newMovedAlternate
+	unchanged 1
+	unchanged 2
+	this line should be marked as oldMovedAlternate newMoved
+	this line should be marked as oldMoved newMoved/newMovedAlternate
+	unchanged 3
+	this line should be marked as oldMoved newMoved
+	unchanged 4
+	EOF
+	test_expect_code 1 git diff --no-index --color --color-moved=zebra \
+		old.txt new.txt >output && cat output &&
+	grep -v index output | test_decode_color >actual &&
+	cat >expect <<-\EOF &&
+	<BOLD>diff --git a/old.txt b/new.txt<RESET>
+	<BOLD>--- a/old.txt<RESET>
+	<BOLD>+++ b/new.txt<RESET>
+	<CYAN>@@ -1,13 +1,15 @@<RESET>
+	<BOLD;MAGENTA>-this line should be marked as moved<RESET>
+	<GREEN>+<RESET><GREEN>too short<RESET>
+	 unchanged<RESET>
+	 unchanged<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>this line should be marked as moved<RESET>
+	<GREEN>+<RESET><GREEN>too short<RESET>
+	 unchanged<RESET>
+	 unchanged<RESET>
+	<RED>-too short<RESET>
+	<BOLD;MAGENTA>-this line should be marked as oldMoved newMoved<RESET>
+	<BOLD;BLUE>-this line should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>this line should be marked as oldMoved newMoved/newMovedAlternate<RESET>
+	 unchanged 1<RESET>
+	 unchanged 2<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>this line should be marked as oldMovedAlternate newMoved<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>this line should be marked as oldMoved newMoved/newMovedAlternate<RESET>
+	 unchanged 3<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>this line should be marked as oldMoved newMoved<RESET>
+	 unchanged 4<RESET>
+	<BOLD;MAGENTA>-this line should be marked as oldMoved newMoved/newMovedAlternate<RESET>
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'cmd option assumes configured colored-moved' '
+	test_config color.diff.oldMoved "magenta" &&
+	test_config color.diff.newMoved "cyan" &&
+	test_config color.diff.oldMovedAlternative "blue" &&
+	test_config color.diff.newMovedAlternative "yellow" &&
+	test_config color.diff.oldMovedDimmed "normal magenta" &&
+	test_config color.diff.newMovedDimmed "normal cyan" &&
+	test_config color.diff.oldMovedAlternativeDimmed "normal blue" &&
+	test_config color.diff.newMovedAlternativeDimmed "normal yellow" &&
+	test_config diff.colorMoved zebra &&
+	git diff HEAD --no-renames --color-moved --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,16 +1,16 @@<RESET>
+	<MAGENTA>-long line 1<RESET>
+	<MAGENTA>-long line 2<RESET>
+	<MAGENTA>-long line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	 line 6<RESET>
+	 line 7<RESET>
+	 line 8<RESET>
+	 line 9<RESET>
+	<CYAN>+<RESET><CYAN>long line 1<RESET>
+	<CYAN>+<RESET><CYAN>long line 2<RESET>
+	<CYAN>+<RESET><CYAN>long line 3<RESET>
+	<YELLOW>+<RESET><YELLOW>long line 14<RESET>
+	<YELLOW>+<RESET><YELLOW>long line 15<RESET>
+	<YELLOW>+<RESET><YELLOW>long line 16<RESET>
+	 line 10<RESET>
+	 line 11<RESET>
+	 line 12<RESET>
+	 line 13<RESET>
+	<MAGENTA>-long line 14<RESET>
+	<MAGENTA>-long line 15<RESET>
+	<MAGENTA>-long line 16<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'no effect on diff from --color-moved with --word-diff' '
+	cat <<-\EOF >text.txt &&
+	Lorem Ipsum is simply dummy text of the printing and typesetting industry.
+	EOF
+	git add text.txt &&
+	git commit -a -m "clean state" &&
+	cat <<-\EOF >text.txt &&
+	simply Lorem Ipsum dummy is text of the typesetting and printing industry.
+	EOF
+	git diff --color-moved --word-diff >actual &&
+	git diff --word-diff >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'no effect on show from --color-moved with --word-diff' '
+	git show --color-moved --word-diff >actual &&
+	git show --word-diff >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'set up whitespace tests' '
+	git reset --hard &&
+	# Note that these lines have no leading or trailing whitespace.
+	cat <<-\EOF >lines.txt &&
+	line 1
+	line 2
+	line 3
+	line 4
+	line 5
+	long line 6
+	long line 7
+	long line 8
+	long line 9
+	EOF
+	git add lines.txt &&
+	git commit -m "add poetry" &&
+	git config color.diff.oldMoved "magenta" &&
+	git config color.diff.newMoved "cyan"
+'
+
+test_expect_success 'move detection ignoring whitespace ' '
+	q_to_tab <<-\EOF >lines.txt &&
+	Qlong line 6
+	Qlong line 7
+	Qlong line 8
+	Qchanged long line 9
+	line 1
+	line 2
+	line 3
+	line 4
+	line 5
+	EOF
+	git diff HEAD --no-renames --color-moved --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<GREEN>+<RESET>	<GREEN>long line 6<RESET>
+	<GREEN>+<RESET>	<GREEN>long line 7<RESET>
+	<GREEN>+<RESET>	<GREEN>long line 8<RESET>
+	<GREEN>+<RESET>	<GREEN>changed long line 9<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<RED>-long line 6<RESET>
+	<RED>-long line 7<RESET>
+	<RED>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual &&
+
+	git diff HEAD --no-renames --color-moved --color \
+		--color-moved-ws=ignore-all-space >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<CYAN>+<RESET>	<CYAN>long line 6<RESET>
+	<CYAN>+<RESET>	<CYAN>long line 7<RESET>
+	<CYAN>+<RESET>	<CYAN>long line 8<RESET>
+	<GREEN>+<RESET>	<GREEN>changed long line 9<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<MAGENTA>-long line 6<RESET>
+	<MAGENTA>-long line 7<RESET>
+	<MAGENTA>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'move detection ignoring whitespace changes' '
+	git reset --hard &&
+	# Lines 6-8 have a space change, but 9 is new whitespace
+	q_to_tab <<-\EOF >lines.txt &&
+	longQline 6
+	longQline 7
+	longQline 8
+	long liQne 9
+	line 1
+	line 2
+	line 3
+	line 4
+	line 5
+	EOF
+
+	git diff HEAD --no-renames --color-moved --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<GREEN>+<RESET><GREEN>long	line 6<RESET>
+	<GREEN>+<RESET><GREEN>long	line 7<RESET>
+	<GREEN>+<RESET><GREEN>long	line 8<RESET>
+	<GREEN>+<RESET><GREEN>long li	ne 9<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<RED>-long line 6<RESET>
+	<RED>-long line 7<RESET>
+	<RED>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual &&
+
+	git diff HEAD --no-renames --color-moved --color \
+		--color-moved-ws=ignore-space-change >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<CYAN>+<RESET><CYAN>long	line 6<RESET>
+	<CYAN>+<RESET><CYAN>long	line 7<RESET>
+	<CYAN>+<RESET><CYAN>long	line 8<RESET>
+	<GREEN>+<RESET><GREEN>long li	ne 9<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<MAGENTA>-long line 6<RESET>
+	<MAGENTA>-long line 7<RESET>
+	<MAGENTA>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'move detection ignoring whitespace at eol' '
+	git reset --hard &&
+	# Lines 6-9 have new eol whitespace, but 9 also has it in the middle
+	q_to_tab <<-\EOF >lines.txt &&
+	long line 6Q
+	long line 7Q
+	long line 8Q
+	longQline 9Q
+	line 1
+	line 2
+	line 3
+	line 4
+	line 5
+	EOF
+
+	# avoid cluttering the output with complaints about our eol whitespace
+	test_config core.whitespace -blank-at-eol &&
+
+	git diff HEAD --no-renames --color-moved --color >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<GREEN>+<RESET><GREEN>long line 6	<RESET>
+	<GREEN>+<RESET><GREEN>long line 7	<RESET>
+	<GREEN>+<RESET><GREEN>long line 8	<RESET>
+	<GREEN>+<RESET><GREEN>long	line 9	<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<RED>-long line 6<RESET>
+	<RED>-long line 7<RESET>
+	<RED>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual &&
+
+	git diff HEAD --no-renames --color-moved --color \
+		--color-moved-ws=ignore-space-at-eol >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/lines.txt b/lines.txt<RESET>
+	<BOLD>--- a/lines.txt<RESET>
+	<BOLD>+++ b/lines.txt<RESET>
+	<CYAN>@@ -1,9 +1,9 @@<RESET>
+	<CYAN>+<RESET><CYAN>long line 6	<RESET>
+	<CYAN>+<RESET><CYAN>long line 7	<RESET>
+	<CYAN>+<RESET><CYAN>long line 8	<RESET>
+	<GREEN>+<RESET><GREEN>long	line 9	<RESET>
+	 line 1<RESET>
+	 line 2<RESET>
+	 line 3<RESET>
+	 line 4<RESET>
+	 line 5<RESET>
+	<MAGENTA>-long line 6<RESET>
+	<MAGENTA>-long line 7<RESET>
+	<MAGENTA>-long line 8<RESET>
+	<RED>-long line 9<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'clean up whitespace-test colors' '
+	git config --unset color.diff.oldMoved &&
+	git config --unset color.diff.newMoved
+'
+
+test_expect_success '--color-moved block at end of diff output respects MIN_ALNUM_COUNT' '
+	git reset --hard &&
+	>bar &&
+	cat <<-\EOF >foo &&
+	irrelevant_line
+	line1
+	EOF
+	git add foo bar &&
+	git commit -m x &&
+
+	cat <<-\EOF >bar &&
+	line1
+	EOF
+	cat <<-\EOF >foo &&
+	irrelevant_line
+	EOF
+
+	git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat >expected <<-\EOF &&
+	<BOLD>diff --git a/bar b/bar<RESET>
+	<BOLD>--- a/bar<RESET>
+	<BOLD>+++ b/bar<RESET>
+	<CYAN>@@ -0,0 +1 @@<RESET>
+	<GREEN>+<RESET><GREEN>line1<RESET>
+	<BOLD>diff --git a/foo b/foo<RESET>
+	<BOLD>--- a/foo<RESET>
+	<BOLD>+++ b/foo<RESET>
+	<CYAN>@@ -1,2 +1 @@<RESET>
+	 irrelevant_line<RESET>
+	<RED>-line1<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success '--color-moved respects MIN_ALNUM_COUNT' '
+	git reset --hard &&
+	cat <<-\EOF >foo &&
+	nineteen chars 456789
+	irrelevant_line
+	twenty chars 234567890
+	EOF
+	>bar &&
+	git add foo bar &&
+	git commit -m x &&
+
+	cat <<-\EOF >foo &&
+	irrelevant_line
+	EOF
+	cat <<-\EOF >bar &&
+	twenty chars 234567890
+	nineteen chars 456789
+	EOF
+
+	git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat >expected <<-\EOF &&
+	<BOLD>diff --git a/bar b/bar<RESET>
+	<BOLD>--- a/bar<RESET>
+	<BOLD>+++ b/bar<RESET>
+	<CYAN>@@ -0,0 +1,2 @@<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>twenty chars 234567890<RESET>
+	<GREEN>+<RESET><GREEN>nineteen chars 456789<RESET>
+	<BOLD>diff --git a/foo b/foo<RESET>
+	<BOLD>--- a/foo<RESET>
+	<BOLD>+++ b/foo<RESET>
+	<CYAN>@@ -1,3 +1 @@<RESET>
+	<RED>-nineteen chars 456789<RESET>
+	 irrelevant_line<RESET>
+	<BOLD;MAGENTA>-twenty chars 234567890<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success '--color-moved treats adjacent blocks as separate for MIN_ALNUM_COUNT' '
+	git reset --hard &&
+	cat <<-\EOF >foo &&
+	7charsA
+	irrelevant_line
+	7charsB
+	7charsC
+	EOF
+	>bar &&
+	git add foo bar &&
+	git commit -m x &&
+
+	cat <<-\EOF >foo &&
+	irrelevant_line
+	EOF
+	cat <<-\EOF >bar &&
+	7charsB
+	7charsC
+	7charsA
+	EOF
+
+	git diff HEAD --color-moved=zebra --color --no-renames >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat >expected <<-\EOF &&
+	<BOLD>diff --git a/bar b/bar<RESET>
+	<BOLD>--- a/bar<RESET>
+	<BOLD>+++ b/bar<RESET>
+	<CYAN>@@ -0,0 +1,3 @@<RESET>
+	<GREEN>+<RESET><GREEN>7charsB<RESET>
+	<GREEN>+<RESET><GREEN>7charsC<RESET>
+	<GREEN>+<RESET><GREEN>7charsA<RESET>
+	<BOLD>diff --git a/foo b/foo<RESET>
+	<BOLD>--- a/foo<RESET>
+	<BOLD>+++ b/foo<RESET>
+	<CYAN>@@ -1,4 +1 @@<RESET>
+	<RED>-7charsA<RESET>
+	 irrelevant_line<RESET>
+	<RED>-7charsB<RESET>
+	<RED>-7charsC<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success '--color-moved rewinds for MIN_ALNUM_COUNT' '
+	git reset --hard &&
+	test_write_lines >file \
+		A B C one two three four five six seven D E F G H I J &&
+	git add file &&
+	test_write_lines >file \
+		one two A B C D E F G H I J two three four five six seven &&
+	git diff --color-moved=zebra -- file &&
+
+	git diff --color-moved=zebra --color -- file >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	cat >expected <<-\EOF &&
+	<BOLD>diff --git a/file b/file<RESET>
+	<BOLD>--- a/file<RESET>
+	<BOLD>+++ b/file<RESET>
+	<CYAN>@@ -1,13 +1,8 @@<RESET>
+	<GREEN>+<RESET><GREEN>one<RESET>
+	<GREEN>+<RESET><GREEN>two<RESET>
+	 A<RESET>
+	 B<RESET>
+	 C<RESET>
+	<RED>-one<RESET>
+	<BOLD;MAGENTA>-two<RESET>
+	<BOLD;MAGENTA>-three<RESET>
+	<BOLD;MAGENTA>-four<RESET>
+	<BOLD;MAGENTA>-five<RESET>
+	<BOLD;MAGENTA>-six<RESET>
+	<BOLD;MAGENTA>-seven<RESET>
+	 D<RESET>
+	 E<RESET>
+	 F<RESET>
+	<CYAN>@@ -15,3 +10,9 @@<RESET> <RESET>G<RESET>
+	 H<RESET>
+	 I<RESET>
+	 J<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>two<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>three<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>four<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>five<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>six<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>seven<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'move detection with submodules' '
+	test_create_repo bananas &&
+	echo ripe >bananas/recipe &&
+	git -C bananas add recipe &&
+	test_commit fruit &&
+	test_commit -C bananas recipe &&
+	git submodule add ./bananas &&
+	git add bananas &&
+	git commit -a -m "bananas are like a heavy library?" &&
+	echo foul >bananas/recipe &&
+	echo ripe >fruit.t &&
+
+	git diff --submodule=diff --color-moved --color >actual &&
+
+	# no move detection as the moved line is across repository boundaries.
+	test_decode_color <actual >decoded_actual &&
+	! grep BGREEN decoded_actual &&
+	! grep BRED decoded_actual &&
+
+	# nor did we mess with it another way
+	git diff --submodule=diff --color >expect.raw &&
+	test_decode_color <expect.raw >expect &&
+	test_cmp expect decoded_actual &&
+	rm -rf bananas &&
+	git submodule deinit bananas
+'
+
+test_expect_success 'only move detection ignores white spaces' '
+	git reset --hard &&
+	q_to_tab <<-\EOF >text.txt &&
+		a long line to exceed per-line minimum
+		another long line to exceed per-line minimum
+		original file
+	EOF
+	git add text.txt &&
+	git commit -m "add text" &&
+	q_to_tab <<-\EOF >text.txt &&
+		Qa long line to exceed per-line minimum
+		Qanother long line to exceed per-line minimum
+		new file
+	EOF
+
+	# Make sure we get a different diff using -w
+	git diff --color --color-moved -w >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	q_to_tab <<-\EOF >expected &&
+	<BOLD>diff --git a/text.txt b/text.txt<RESET>
+	<BOLD>--- a/text.txt<RESET>
+	<BOLD>+++ b/text.txt<RESET>
+	<CYAN>@@ -1,3 +1,3 @@<RESET>
+	 Qa long line to exceed per-line minimum<RESET>
+	 Qanother long line to exceed per-line minimum<RESET>
+	<RED>-original file<RESET>
+	<GREEN>+<RESET><GREEN>new file<RESET>
+	EOF
+	test_cmp expected actual &&
+
+	# And now ignoring white space only in the move detection
+	git diff --color --color-moved \
+		--color-moved-ws=ignore-all-space,ignore-space-change,ignore-space-at-eol >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+	q_to_tab <<-\EOF >expected &&
+	<BOLD>diff --git a/text.txt b/text.txt<RESET>
+	<BOLD>--- a/text.txt<RESET>
+	<BOLD>+++ b/text.txt<RESET>
+	<CYAN>@@ -1,3 +1,3 @@<RESET>
+	<BOLD;MAGENTA>-a long line to exceed per-line minimum<RESET>
+	<BOLD;MAGENTA>-another long line to exceed per-line minimum<RESET>
+	<RED>-original file<RESET>
+	<BOLD;CYAN>+<RESET>Q<BOLD;CYAN>a long line to exceed per-line minimum<RESET>
+	<BOLD;CYAN>+<RESET>Q<BOLD;CYAN>another long line to exceed per-line minimum<RESET>
+	<GREEN>+<RESET><GREEN>new file<RESET>
+	EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'compare whitespace delta across moved blocks' '
+
+	git reset --hard &&
+	q_to_tab <<-\EOF >text.txt &&
+	QIndented
+	QText across
+	Qsome lines
+	QBut! <- this stands out
+	QAdjusting with
+	QQdifferent starting
+	Qwhite spaces
+	QAnother outlier
+	QQQIndented
+	QQQText across
+	QQQfive lines
+	QQQthat has similar lines
+	QQQto previous blocks, but with different indent
+	QQQYetQAnotherQoutlierQ
+	QLine with internal w h i t e s p a c e change
+	EOF
+
+	git add text.txt &&
+	git commit -m "add text.txt" &&
+
+	q_to_tab <<-\EOF >text.txt &&
+	QQIndented
+	QQText across
+	QQsome lines
+	QQQBut! <- this stands out
+	Adjusting with
+	Qdifferent starting
+	white spaces
+	AnotherQoutlier
+	QQIndented
+	QQText across
+	QQfive lines
+	QQthat has similar lines
+	QQto previous blocks, but with different indent
+	QQYetQAnotherQoutlier
+	QLine with internal whitespace change
+	EOF
+
+	git diff --color --color-moved --color-moved-ws=allow-indentation-change >actual.raw &&
+	grep -v "index" actual.raw | test_decode_color >actual &&
+
+	q_to_tab <<-\EOF >expected &&
+		<BOLD>diff --git a/text.txt b/text.txt<RESET>
+		<BOLD>--- a/text.txt<RESET>
+		<BOLD>+++ b/text.txt<RESET>
+		<CYAN>@@ -1,15 +1,15 @@<RESET>
+		<BOLD;MAGENTA>-QIndented<RESET>
+		<BOLD;MAGENTA>-QText across<RESET>
+		<BOLD;MAGENTA>-Qsome lines<RESET>
+		<RED>-QBut! <- this stands out<RESET>
+		<BOLD;MAGENTA>-QAdjusting with<RESET>
+		<BOLD;MAGENTA>-QQdifferent starting<RESET>
+		<BOLD;MAGENTA>-Qwhite spaces<RESET>
+		<RED>-QAnother outlier<RESET>
+		<BOLD;MAGENTA>-QQQIndented<RESET>
+		<BOLD;MAGENTA>-QQQText across<RESET>
+		<BOLD;MAGENTA>-QQQfive lines<RESET>
+		<BOLD;MAGENTA>-QQQthat has similar lines<RESET>
+		<BOLD;MAGENTA>-QQQto previous blocks, but with different indent<RESET>
+		<RED>-QQQYetQAnotherQoutlierQ<RESET>
+		<RED>-QLine with internal w h i t e s p a c e change<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Indented<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Text across<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>some lines<RESET>
+		<GREEN>+<RESET>QQQ<GREEN>But! <- this stands out<RESET>
+		<BOLD;CYAN>+<RESET><BOLD;CYAN>Adjusting with<RESET>
+		<BOLD;CYAN>+<RESET>Q<BOLD;CYAN>different starting<RESET>
+		<BOLD;CYAN>+<RESET><BOLD;CYAN>white spaces<RESET>
+		<GREEN>+<RESET><GREEN>AnotherQoutlier<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Indented<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>Text across<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>five lines<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>that has similar lines<RESET>
+		<BOLD;CYAN>+<RESET>QQ<BOLD;CYAN>to previous blocks, but with different indent<RESET>
+		<GREEN>+<RESET>QQ<GREEN>YetQAnotherQoutlier<RESET>
+		<GREEN>+<RESET>Q<GREEN>Line with internal whitespace change<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'bogus settings in move detection erroring out' '
+	test_must_fail git diff --color-moved=bogus 2>err &&
+	test_grep "must be one of" err &&
+	test_grep bogus err &&
+
+	test_must_fail git -c diff.colormoved=bogus diff 2>err &&
+	test_grep "must be one of" err &&
+	test_grep "from command-line config" err &&
+
+	test_must_fail git diff --color-moved-ws=bogus 2>err &&
+	test_grep "possible values" err &&
+	test_grep bogus err &&
+
+	test_must_fail git -c diff.colormovedws=bogus diff 2>err &&
+	test_grep "possible values" err &&
+	test_grep "from command-line config" err
+'
+
+test_expect_success 'compare whitespace delta incompatible with other space options' '
+	test_must_fail git diff \
+		--color-moved-ws=allow-indentation-change,ignore-all-space \
+		2>err &&
+	test_grep allow-indentation-change err
+'
+
+EMPTY=''
+test_expect_success 'compare mixed whitespace delta across moved blocks' '
+
+	git reset --hard &&
+	tr "^|Q_" "\f\v\t " <<-EOF >text.txt &&
+	^__
+	|____too short without
+	^
+	___being grouped across blank line
+	${EMPTY}
+	context
+	lines
+	to
+	anchor
+	____Indented text to
+	_Q____be further indented by four spaces across
+	____Qseveral lines
+	QQ____These two lines have had their
+	____indentation reduced by four spaces
+	Qdifferent indentation change
+	____too short
+	EOF
+
+	git add text.txt &&
+	git commit -m "add text.txt" &&
+
+	tr "^|Q_" "\f\v\t " <<-EOF >text.txt &&
+	context
+	lines
+	to
+	anchor
+	QIndented text to
+	QQbe further indented by four spaces across
+	Q____several lines
+	${EMPTY}
+	QQtoo short without
+	${EMPTY}
+	^Q_______being grouped across blank line
+	${EMPTY}
+	Q_QThese two lines have had their
+	indentation reduced by four spaces
+	QQdifferent indentation change
+	__Qtoo short
+	EOF
+
+	git -c color.diff.whitespace="normal red" \
+		-c core.whitespace=space-before-tab \
+		diff --color --color-moved --ws-error-highlight=all \
+		--color-moved-ws=allow-indentation-change >actual.raw &&
+	grep -v "index" actual.raw | tr "\f\v" "^|" | test_decode_color >actual &&
+
+	cat <<-\EOF >expected &&
+	<BOLD>diff --git a/text.txt b/text.txt<RESET>
+	<BOLD>--- a/text.txt<RESET>
+	<BOLD>+++ b/text.txt<RESET>
+	<CYAN>@@ -1,16 +1,16 @@<RESET>
+	<BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>^<RESET><BRED>  <RESET>
+	<BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>|    too short without<RESET>
+	<BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>^<RESET>
+	<BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>   being grouped across blank line<RESET>
+	<BOLD;MAGENTA>-<RESET>
+	 <RESET>context<RESET>
+	 <RESET>lines<RESET>
+	 <RESET>to<RESET>
+	 <RESET>anchor<RESET>
+	<BOLD;MAGENTA>-<RESET><BOLD;MAGENTA>    Indented text to<RESET>
+	<BOLD;MAGENTA>-<RESET><BRED> <RESET>	<BOLD;MAGENTA>    be further indented by four spaces across<RESET>
+	<BOLD;MAGENTA>-<RESET><BRED>    <RESET>	<BOLD;MAGENTA>several lines<RESET>
+	<BOLD;BLUE>-<RESET>		<BOLD;BLUE>    These two lines have had their<RESET>
+	<BOLD;BLUE>-<RESET><BOLD;BLUE>    indentation reduced by four spaces<RESET>
+	<BOLD;MAGENTA>-<RESET>	<BOLD;MAGENTA>different indentation change<RESET>
+	<RED>-<RESET><RED>    too short<RESET>
+	<BOLD;CYAN>+<RESET>	<BOLD;CYAN>Indented text to<RESET>
+	<BOLD;CYAN>+<RESET>		<BOLD;CYAN>be further indented by four spaces across<RESET>
+	<BOLD;CYAN>+<RESET>	<BOLD;CYAN>    several lines<RESET>
+	<BOLD;YELLOW>+<RESET>
+	<BOLD;YELLOW>+<RESET>		<BOLD;YELLOW>too short without<RESET>
+	<BOLD;YELLOW>+<RESET>
+	<BOLD;YELLOW>+<RESET><BOLD;YELLOW>^	       being grouped across blank line<RESET>
+	<BOLD;YELLOW>+<RESET>
+	<BOLD;CYAN>+<RESET>	<BRED> <RESET>	<BOLD;CYAN>These two lines have had their<RESET>
+	<BOLD;CYAN>+<RESET><BOLD;CYAN>indentation reduced by four spaces<RESET>
+	<BOLD;YELLOW>+<RESET>		<BOLD;YELLOW>different indentation change<RESET>
+	<GREEN>+<RESET><BRED>  <RESET>	<GREEN>too short<RESET>
+	EOF
+
+	test_cmp expected actual
+'
+
+test_expect_success 'combine --ignore-blank-lines with --function-context' '
+	test_write_lines 1 "" 2 3 4 5 >a &&
+	test_write_lines 1    2 3 4   >b &&
+	test_must_fail git diff --no-index \
+		--ignore-blank-lines --function-context a b >actual.raw &&
+	sed -n "/@@/,\$p" <actual.raw >actual &&
+	cat <<-\EOF >expect &&
+	@@ -1,6 +1,4 @@
+	 1
+	-
+	 2
+	 3
+	 4
+	-5
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'combine --ignore-blank-lines with --function-context 2' '
+	test_write_lines    a b c "" function 1 2 3 4 5 "" 6 7 8 9 >a &&
+	test_write_lines "" a b c "" function 1 2 3 4 5    6 7 8   >b &&
+	test_must_fail git diff --no-index \
+		--ignore-blank-lines --function-context a b >actual.raw &&
+	sed -n "/@@/,\$p" <actual.raw >actual &&
+	cat <<-\EOF >expect &&
+	@@ -5,11 +6,9 @@ c
+	 function
+	 1
+	 2
+	 3
+	 4
+	 5
+	-
+	 6
+	 7
+	 8
+	-9
+	EOF
+	test_cmp expect actual
+'
+
+test_done