static const char *diff_filter = NULL;
static char *diff_stages_usage =
-"git-diff-stages [-p] [-r] [-z] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] <stage1> <stage2> [<path>...]";
+"git-diff-stages [<common diff options>] <stage1> <stage2> [<path>...]"
+COMMON_DIFF_OPTIONS_HELP;
static void diff_stages(int stage1, int stage2)
{