fix tests

spec/observers/key_observer_spec.rb

 require 'spec_helper'
 describe KeyObserver do
-  before do 
+  before do
     @key = double('Key',
       identifier: 'admin_654654',
       key: '== a vaild ssh key',
@@ -15,7 +15,7 @@ describe KeyObserver do
     )
     @observer = KeyObserver.instance
-    @observer.stub(:git_host => @gitolite)
+    @observer.stub(gitolite: @gitolite)
   end
   context :after_save do
@@ -25,7 +25,7 @@ describe KeyObserver do
     end
   end
-  context :after_destroy do 
+  context :after_destroy do
     it do
       @gitolite.should_receive(:remove_key).with(@key.identifier, @key.projects)
       @observer.after_destroy(@key)