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-rw-r--r--lib/PublicInbox/LEI.pm3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 3e17a614..b82fb003 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -180,8 +180,9 @@ our %CMD = ( # sorted in order of importance/use:
         qw(git-dir=s@ cwd! verbose|v+ mail! oid-a|A=s path-a|a=s path-b|b=s),
         @lxs_opt, @c_opt ],
 
-'rediff' => [ '[--stdin|LOCATION...]',
+'rediff' => [ '--stdin|LOCATION...',
                 'regenerate a diff with different options',
+        'stdin|', # /|\z/ must be first for lone dash
         qw(git-dir=s@ cwd! verbose|v+ color:s no-color),
         @diff_opt, @lxs_opt, @c_opt ],