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-rw-r--r--runtime/ftplugin/diff.vim23
1 files changed, 23 insertions, 0 deletions
diff --git a/runtime/ftplugin/diff.vim b/runtime/ftplugin/diff.vim
new file mode 100644
index 0000000..bf37d46
--- /dev/null
+++ b/runtime/ftplugin/diff.vim
@@ -0,0 +1,23 @@
+" Vim filetype plugin file
+" Language: Diff
+" Maintainer: Bram Moolenaar <Bram@vim.org>
+" Last Change: 2021 Nov 14
+
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+ finish
+endif
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl modeline< commentstring<"
+
+" Don't use modelines in a diff, they apply to the diffed file
+setlocal nomodeline
+
+" If there are comments they start with #
+let &l:commentstring = "# %s"
+
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+ let b:browsefilter = "Diff Files (*.diff)\t*.diff\nPatch Files (*.patch)\t*.h\nAll Files (*.*)\t*.*\n"
+ let b:undo_ftplugin ..= " | unlet! b:browsefilter"
+endif