Fix rubocop

lib/gitlab/dependency_linker.rb

 module Gitlab
   module DependencyLinker
     LINKERS = [
-      GemfileLinker,
+      GemfileLinker
     ].freeze
 
     def self.linker(blob_name)

spec/features/issues/form_spec.rb

@@ -27,7 +27,7 @@ describe 'New/edit issue', :feature, :js do
     describe 'single assignee' do
       it 'hides assignee after selection' do
         click_button 'Unassigned'
-        
+
         wait_for_ajax
       end
 
@@ -154,7 +154,7 @@ describe 'New/edit issue', :feature, :js do
 
     it 'correctly updates the selected user when changing assignee' do
       click_button 'Unassigned'
-      
+
       wait_for_ajax
 
       page.within '.dropdown-menu-user' do
@@ -233,4 +233,4 @@ describe 'New/edit issue', :feature, :js do
     JS
     page.evaluate_script(js)
   end
-end
+end
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