Display usage for unknown parameters etc. again

For some reason, this had disappeared.

1 files changed, 3 insertions, 0 deletions

diff --git a/bin/brew b/bin/brew
index b06be3c8a..099e6c466 100755
--- a/bin/brew
+++ b/bin/brew
@@ -306,6 +306,9 @@ begin
           end
         end
       end
+      
+    else
+      puts usage
   end
 
 rescue StandardError, Interrupt => e