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+Git v2.41 Release Notes
+=======================
+
+UI, Workflows & Features
+
+ * Allow information carried on the WWW-Authenticate header to be
+ passed to the credential helpers.
+
+ * A new "fetch.hideRefs" option can be used to exclude specified refs
+ from "rev-list --objects --stdin --not --all" traversal for
+ checking object connectivity, most useful when there are many
+ unrelated histories in a single repository.
+
+ * "git push" has been taught to allow deletion of refs with one-level
+ names to help repairing a repository who acquired such a ref by
+ mistake. In general, we don't encourage use of such a ref, and
+ creation or update to such a ref is rejected as before.
+
+ * Allow "git bisect reset" to check out the original branch when the
+ branch is already checked out in a different worktree linked to the
+ same repository.
+
+ * A few subcommands have been taught to stop users from working on a
+ branch that is being used in another worktree linked to the same
+ repository.
+
+ * "git format-patch" learned to write a log-message only output file
+ for empty commits.
+
+ * "git format-patch" honors the src/dst prefixes set to nonstandard
+ values with configuration variables like "diff.noprefix", causing
+ receiving end of the patch that expects the standard -p1 format to
+ break. "format-patch" has been taught to ignore end-user configuration
+ and always use the standard prefixes.
+
+ This is a backward compatibility breaking change.
+
+ * Lift the limitation that colored prompts can only be used with
+ PROMPT_COMMAND mode.
+
+ * "git blame --contents=<file> <rev> -- <path>" used to be forbidden,
+ but now it finds the origins of lines starting at <file> contents
+ through the history that leads to <rev>.
+
+ * "git pack-redundant" gave a warning when run, as the command has
+ outlived its usefulness long ago and is nominated for future
+ removal. Now we escalate to give an error.
+
+ * "git clone" from an empty repository learned to propagate the
+ choice of the hash algorithm from the source repository to the
+ newly created repository over any one of the v0/v1/v2 protocol.
+
+ * "git mergetool" and "git difftool" learns a new configuration
+ guiDefault to optionally favor configured guitool over non-gui-tool
+ automatically when $DISPLAY is set.
+
+ * "git branch -d origin/master" would say "no such branch", but it is
+ likely a missed "-r" if refs/remotes/origin/master exists. The
+ command has been taught to give such a hint in its error message.
+
+ * Clean-up of the code path that deals with merge strategy option
+ handling in "git rebase".
+
+ * "git clone --local" stops copying from an original repository that
+ has symbolic links inside its $GIT_DIR; an error message when that
+ happens has been updated.
+
+ * The "--format=..." option of "git for-each-ref", "git branch", and
+ "git tag" commands learn "--omit-empty" to hide refs whose
+ formatting results in an empty string from the output.
+
+ * The sendemail-validate validate hook learned to pass the total
+ number of input files and where in the sequence each invocation is
+ via environment variables.
+
+ * When "gc" needs to retain unreachable objects, packing them into
+ cruft packs (instead of exploding them into loose object files) has
+ been offered as a more efficient option for some time. Now the use
+ of cruft packs has been made the default and no longer considered
+ an experimental feature.
+
+ * The output given by "git blame" that attributes a line to contents
+ taken from the file specified by the "--contents" option shows it
+ differently from a line attributed to the working tree file.
+
+ * "git send-email" learned to give the e-mail headers to the validate
+ hook by passing an extra argument from the command line.
+
+ * The credential subsystem learns to help OAuth framework.
+
+ * The titles of manual pages used to be chomped at an unreasonably
+ short limit, which has been removed.
+
+ * Error messages given when working on an unborn branch that is
+ checked out in another worktree have been improved.
+
+ * The documentation was misleading about the interaction between
+ GIT_DEFAULT_HASH and "git clone", which has been clarified to
+ stress that the variable is to be ignored by the command.
+
+ * "git send-email" learned "--header-cmd=<cmd>" that can inject
+ arbitrary e-mail header lines to the outgoing messages.
+
+ * "git fsck" learned to detect bit-flip breakages in the reachability
+ bitmap files.
+
+ * The "--stdin" option of "git name-rev" has been replaced with
+ the "--annotate-stdin" option more than a year ago. We stop
+ advertising it in the "git name-rev -h" output.
+
+ * "git push --all" gained an alias "git push --branches".
+
+ * "git fetch" learned the "--porcelain" option that emits what it did
+ in a machine-parseable format.
+
+ * "git --attr-source=<tree> cmd $args" is a new way to have any
+ command to read attributes not from the working tree but from the
+ given tree object.
+
+
+Performance, Internal Implementation, Development Support etc.
+
+ * Code clean-up to clarify directory traversal API.
+
+ * Code clean-up to clarify the rule that "git-compat-util.h" must be
+ the first to be included.
+
+ * More work towards -Wunused.
+
+ * Instead of forcing each command to choose to honor GPG related
+ configuration variables, make the subsystem lazily initialize
+ itself.
+
+ * Remove workaround for ancient versions of DocBook to make it work
+ correctly with groff, which has not been necessary since docbook
+ 1.76 from 2010.
+
+ * Code clean-up to include and/or uninclude parse-options.h file as
+ needed.
+
+ * The code path that reports what "git fetch" did to each ref has
+ been cleaned up.
+
+ * Assorted config API updates.
+
+ * A few configuration variables to tell the cURL library that
+ different types of ssl-cert and ssl-key are in use have been added.
+
+ * Split key function and data structure definitions out of cache.h to
+ new header files and adjust the users.
+
+ * "git fetch --all" does not have to download and handle the same
+ bundleURI over and over, which has been corrected.
+
+ * "git sparse-checkout" command learns a debugging aid for the sparse
+ rule definitions.
+
+ * "git write-tree" learns to work better with sparse-index.
+
+ * The on-disk reverse index that allows mapping from the pack offset
+ to the object name for the object stored at the offset has been
+ enabled by default.
+
+ * "git fsck" learned to validate the on-disk pack reverse index files.
+
+ * strtok() and strtok_r() are banned in this codebase.
+
+ * The detect-compilers script to help auto-tweaking the build system
+ had trouble working with compilers whose version number has extra
+ suffixes. The script has been taught that certain suffixes (like
+ "-win32" in "gcc 10-win32") can be safely stripped as they share
+ the same features and bugs with the version without the suffix.
+
+ * ctype tests have been taught to test EOF, too.
+
+ * The implementation of credential helpers used fgets() over fixed
+ size buffers to read protocol messages, causing the remainder of
+ the folded long line to trigger unexpected behaviour, which has
+ been corrected.
+
+ * The implementation of the default "negotiator", used to find common
+ ancestor over the network for object tranfer, used to be recursive;
+ it was updated to be iterative to conserve stackspace usage.
+
+ * Our custom callout formatter is no longer used in the documentation
+ formatting toolchain, as the upstream default ones give better
+ output these days.
+
+ * The tracing mechanism learned to notice and report when
+ auto-discovered bare repositories are being used, as allowing so
+ without explicitly stating the user intends to do so (with setting
+ GIT_DIR for example) can be used with social engineering as an
+ attack vector.
+
+ * "git diff-files" learned not to expand sparse-index unless needed.
+
+
+Fixes since v2.40
+-----------------
+
+ * "git fsck" learned to check the index files in other worktrees,
+ just like "git gc" honors them as anchoring points.
+ (merge 8d3e7eac52 jk/fsck-indices-in-worktrees later to maint).
+
+ * Fix a segfaulting loop. The function and its caller may need
+ further clean-up.
+ (merge c5773dc078 ew/commit-reach-clean-up-flags-fix later to maint).
+
+ * "git restore" supports options like "--ours" that are only
+ meaningful during a conflicted merge, but these options are only
+ meaningful when updating the working tree files. These options are
+ marked to be incompatible when both "--staged" and "--worktree" are
+ in effect.
+ (merge ee8a88826a ak/restore-both-incompatible-with-conflicts later to maint).
+
+ * Simplify UI to control progress meter given by "git bundle" command.
+ (merge 8b95521edb jk/bundle-progress later to maint).
+
+ * "git bundle" learned that "-" is a common way to say that the input
+ comes from the standard input and/or the output goes to the
+ standard output. It used to work only for output and only from the
+ root level of the working tree.
+ (merge 0bbe10313e jk/bundle-use-dash-for-stdfiles later to maint).
+
+ * Once we start running, we assumed that the list of alternate object
+ databases would never change. Hook into the machinery used to
+ update the list of packfiles during runtime to update this list as
+ well.
+ (merge e2d003dbed ds/reprepare-alternates-when-repreparing-packfiles later to maint).
+
+ * The code to parse "git rebase -X<opt>" was not prepared to see an
+ unparsable option string, which has been corrected.
+ (merge 15a4cc912e ab/fix-strategy-opts-parsing later to maint).
+
+ * "git add -p" while the index is unmerged sometimes failed to parse
+ the diff output it internally produces and died, which has been
+ corrected.
+ (merge 28d1122f9c jk/add-p-unmerged-fix later to maint).
+
+ * Fix for a "ls-files --format="%(path)" that produced nonsense
+ output, which was a bug in 2.38.
+ (merge cfb62dd006 aj/ls-files-format-fix later to maint).
+
+ * "git receive-pack" that responds to "git push" requests failed to
+ clean a stale lockfile when killed in the middle, which has been
+ corrected.
+ (merge c55c30669c ps/receive-pack-unlock-before-die later to maint).
+
+ * "git rev-parse --quiet foo@{u}", or anything that asks @{u} to be
+ parsed with GET_OID_QUIETLY option, did not quietly fail, which has
+ been corrected.
+ (merge dfbfdc521d fc/oid-quietly-parse-upstream later to maint).
+
+ * Transports that do not support protocol v2 did not correctly fall
+ back to protocol v0 under certain conditions, which has been
+ corrected.
+ (merge eaa0fd6584 jk/fix-proto-downgrade-to-v0 later to maint).
+
+ * time(2) on glib 2.31+, especially on Linux, goes out of sync with
+ higher resolution timers used for gettimeofday(2) and by the
+ filesystem. Replace all calls to it with a git_time() wrapper and
+ (merge 370ddcbc89 pe/time-use-gettimeofday later to maint).
+
+ * Code clean-up to use designated initializers in parse-options API.
+ (merge 353e6d4554 sg/parse-options-h-initializers later to maint).
+
+ * A recent-ish change to allow unicode character classes to be used
+ with "grep -P" triggered a JIT bug in older pcre2 libraries.
+ The problematic change in Git built with these older libraries has
+ been disabled to work around the bug.
+ (merge 14b9a04479 mk/workaround-pcre-jit-ucp-bug later to maint).
+
+ * The wildmatch library code unlearns exponential behaviour it
+ acquired some time ago since it was borrowed from rsync.
+ (merge 3dc0b7f0dc pw/wildmatch-fixes later to maint).
+
+ * The index files can become corrupt under certain conditions when
+ the split-index feature is in use, especially together with
+ fsmonitor, which have been corrected.
+ (merge 061dd722dc js/split-index-fixes later to maint).
+
+ * Document what the pathname-looking strings in "rev-list --object"
+ output are for and what they mean.
+ (merge 15364d2a3c jk/document-rev-list-object-name later to maint).
+
+ * Fix unnecessary truncation of generation numbers used in-core.
+ (merge d3af1c193d ps/ahead-behind-truncation-fix later to maint).
+
+ * Code clean-up around the use of the_repository.
+ (merge 4a93b899c1 ab/remove-implicit-use-of-the-repository later to maint).
+
+ * Consistently spell "Message-ID" as such, not "Message-Id".
+ (merge ba4324c4e1 jc/spell-id-in-both-caps-in-message-id later to maint).
+
+ * Correct use of an uninitialized structure member.
+ (merge dc12ee77ab jx/cap-object-info-uninitialized-fix later to maint).
+
+ * Tests had a few places where we ignored PERL_PATH and blindly used
+ /usr/bin/perl, which have been corrected.
+ (merge c1917156a0 jk/use-perl-path-consistently later to maint).
+
+ * Documentation mark-up fix.
+ (merge 78b6369e67 la/mfc-markup-fix later to maint).
+
+ * Doc toolchain update to remove old workaround for AsciiDoc.
+ (merge 8806120de6 fc/remove-header-workarounds-for-asciidoc later to maint).
+
+ * The userdiff regexp patterns for various filetypes that are built
+ into the system have been updated to avoid triggering regexp errors
+ from UTF-8 aware regex engines.
+ (merge be39144954 rs/userdiff-multibyte-regex later to maint).
+
+ * The approxidate() API has been simplified by losing an extra
+ function that did the same thing as another one.
+ (merge 8a7f0b666f rs/remove-approxidate-relative later to maint).
+
+ * Code clean-up to replace a hardcoded constant with a CPP macro.
+ (merge c870de6502 rs/get-tar-commit-id-use-defined-const later to maint).
+
+ * Doc build simplification.
+ (merge 9a09ed3229 fc/doc-stop-using-manversion later to maint).
+
+ * "git archive" run from a subdirectory mishandled attributes and
+ paths outside the current directory.
+ (merge 92b1dd1b9e rs/archive-from-subdirectory-fixes later to maint).
+
+ * The code to parse capability list for v0 on-wire protocol fell into
+ an infinite loop when a capability appears multiple times, which
+ has been corrected.
+
+ * Geometric repacking ("git repack --geometric=<n>") in a repository
+ that borrows from an alternate object database had various corner
+ case bugs, which have been corrected.
+ (merge d85cd18777 ps/fix-geom-repack-with-alternates later to maint).
+
+ * The "%GT" placeholder for the "--format" option of "git log" and
+ friends caused BUG() to trigger on a commit signed with an unknown
+ key, which has been corrected.
+ (merge 7891e46585 jk/gpg-trust-level-fix later to maint).
+
+ * The completion script used to use bare "read" without the "-r"
+ option to read the contents of various state files, which risked
+ getting confused with backslashes in them. This has been
+ corrected.
+ (merge 197152098a ek/completion-use-read-r-to-read-literally later to maint).
+
+ * A small API fix to the ort merge strategy backend.
+ (merge 000c4ceca7 en/ort-finalize-after-0-merges-fix later to maint).
+
+ * The commit object parser has been taught to be a bit more lenient
+ to parse timestamps on the author/committer line with a malformed
+ author/committer ident.
+ (merge 90ef0f14eb jk/parse-commit-with-malformed-ident later to maint).
+
+ * Retitle a test script with an overly narrow name.
+ (merge 8bb19c14fb ob/t3501-retitle later to maint).
+
+ * Doc update to clarify how text and eol attributes interact to
+ specify the end-of-line conversion.
+ (merge 6696077ace ah/doc-attributes-text later to maint).
+
+ * Gitk updates from GfW project.
+ (merge 99e70f3077 js/gitk-fixes-from-gfw later to maint).
+
+ * "git diff --dirstat" leaked memory, which has been plugged.
+ (merge 83973981eb jc/dirstat-plug-leaks later to maint).
+
+ * "git merge-tree" reads the basic configuration, which can be used
+ by git forges to disable replace-refs feature.
+ (merge b6551feadf ds/merge-tree-use-config later to maint).
+
+ * A few bugs in the sequencer machinery that results in miscounting
+ the steps have been corrected.
+ (merge 170eea9750 js/rebase-count-fixes later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+ (merge f7111175df as/doc-markup-fix later to maint).
+ (merge 90ff7c9898 fc/test-aggregation-clean-up later to maint).
+ (merge 9b0c7f308a jc/am-doc-refer-to-format-patch later to maint).
+ (merge b10cbdac4c bb/unicode-width-table-15 later to maint).
+ (merge 3457b50e8c ab/retire-scripted-add-p later to maint).
+ (merge d52fcf493b ds/p2000-fix-grep-sparse later to maint).
+ (merge ec063d2591 ss/hashmap-typofix later to maint).
+ (merge 1aaed69d11 rs/archive-mtime later to maint).
+ (merge 2da2cc9b28 ob/rollback-after-commit-lock-failure later to maint).
+ (merge 54dbd0933b ob/sequencer-save-head-simplify later to maint).
+ (merge a93cbe8d78 ar/test-cleanup-unused-file-creation later to maint).
+ (merge cc48ddd937 jk/chainlint-fixes later to maint).
+ (merge 4833b08426 ow/ref-format-remove-unused-member later to maint).
+ (merge d0ea2ca1cf dw/doc-submittingpatches-grammofix later to maint).
+ (merge fd72637423 ar/t2024-checkout-output-fix later to maint).
+ (merge d45cbe3fe0 ob/sequencer-i18n-fix later to maint).
+ (merge b734fe49fd ob/messages-capitalize-exception later to maint).
+ (merge ad353d7e77 ma/gittutorial-fixes later to maint).
+ (merge a5855fd8d4 ar/test-cleanup-unused-file-creation-part2 later to maint).
+ (merge 0c5308af30 sd/doc-gitignore-and-rm-cached later to maint).
+ (merge cbb83daeaf kh/doc-interpret-trailers-updates later to maint).
+ (merge 3d77fbb664 ar/config-count-tests-updates later to maint).
+ (merge b7cf25c8f4 jc/t9800-fix-use-of-show-s-raw later to maint).