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-rw-r--r--runtime/ftplugin/diff.vim18
1 files changed, 18 insertions, 0 deletions
diff --git a/runtime/ftplugin/diff.vim b/runtime/ftplugin/diff.vim
new file mode 100644
index 0000000..0464290
--- /dev/null
+++ b/runtime/ftplugin/diff.vim
@@ -0,0 +1,18 @@
+" Vim filetype plugin file
+" Language: Diff
+" Maintainer: Bram Moolenaar <Bram@vim.org>
+" Last Change: 2020 Jul 18
+
+" 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<"
+
+" Don't use modelines in a diff, they apply to the diffed file
+setlocal nomodeline
+
+" If there are comments they start with #
+let &commentstring = "# %s"