notmuch: Reference help, don't print it for unknown commands.

The shorter output is much nicer for something that might end up
in an emacs mini-buffer, for example.

1 files changed, 2 insertions, 2 deletions

diff --git a/notmuch.c b/notmuch.c
index 7ee1d6b..2465e16 100644
--- a/notmuch.c
+++ b/notmuch.c
@@ -1450,8 +1450,8 @@ main (int argc, char *argv[])
 
     /* Don't complain about "help" being an unknown command when we're
        about to provide exactly what's wanted anyway. */
-    fprintf (stderr, "Error: Unknown command '%s'\n\n", argv[1]);
-    usage ();
+    fprintf (stderr, "Error: Unknown command '%s' (see \"notmuch help\")\n",
+	     argv[1]);
 
     return 1;
 }