README.md in rubocop-git-0.0.1 vs README.md in rubocop-git-0.0.2

@@ -16,10 +16,10 @@
 
     $ gem install rubocop-git
 
 ## Usage
 
-    Usage: rubocop-git [options]
+    Usage: rubocop-git [options] [[commit] commit]
         -c, --config FILE                Specify configuration file
         -D, --display-cop-names          Display cop names in offense messages
             --cached                     git diff --cached
             --staged                     synonym of --cached
             --hound                      Hound compatibility mode (require rubocop 0.22.0)