Minor improve to UI and code formatting of gitlab web editor

features/project/source/browse_files.feature

@@ -23,5 +23,5 @@ Feature: Project Browse files
   @javascript
   Scenario: I can edit file
     Given I click on "Gemfile" file in repo
-    And I click button "Edit"
+    And I click button "edit"
     Then I can edit code

features/steps/project/project_browse_files.rb

@@ -32,8 +32,8 @@ class ProjectBrowseFiles < Spinach::FeatureSteps
     page.source.should == ValidCommit::BLOB_FILE
   end
 
-  Given 'I click button "Edit"' do
-    click_link 'Edit'
+  Given 'I click button "edit"' do
+    click_link 'edit'
   end
 
   Then 'I can edit code' do