External projects have been known to parse the output of
"git version".  Help prevent future authors from changing
its format by adding a comment to its implementation.

Signed-off-by: David Aguilar <dav...@gmail.com>
 help.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/help.c b/help.c
index 1dfa0b0..02ba043 100644
--- a/help.c
+++ b/help.c
@@ -397,6 +397,10 @@ const char *help_unknown_cmd(const char *cmd)
 int cmd_version(int argc, const char **argv, const char *prefix)
+       /*
+        * The format of this string should be kept stable for compatibility
+        * with external projects that rely on the output of "git version".
+        */
        printf("git version %s\n", git_version_string);
        return 0;

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