--- tests/unknown_options.stderr.orig	Mon Dec  8 12:52:00 2014
+++ tests/unknown_options.stderr	Mon Dec  8 12:52:10 2014
@@ -1,2 +1,2 @@
-$0: invalid option -- 'b'
-$0: unrecognized option '--whatever'
+$0: invalid option -- b
+$0: unrecognized option `--whatever'