parse-options: make some arguments optional, add callbacks.

diff --git a/builtin-diff-files.c b/builtin-diff-files.c
index 6ba5077a2be6619f110280622cf46a7f4cfb8b01..6cb30c8e12488f42521df71a844a86a2e9a968c7 100644 (file)
--- a/builtin-diff-files.c
+++ b/builtin-diff-files.c
@@ -10,7 +10,7 @@
 #include "builtin.h"
 
 static const char diff_files_usage[] =
-"git-diff-files [-q] [-0/-1/2/3 |-c|--cc|-n|--no-index] [<common diff options>] [<path>...]"
+"git-diff-files [-q] [-0/-1/2/3 |-c|--cc|--no-index] [<common diff options>] [<path>...]"
 COMMON_DIFF_OPTIONS_HELP;
 
 int cmd_diff_files(int argc, const char **argv, const char *prefix)