fix rubocop warning

lib/gitlab/light_url_builder.rb

@@ -16,7 +16,7 @@ module Gitlab
     end
 
     def url
-      #TODO refactor this
+      # TODO refactor this
       case @entity
       when :issue
         issue_url
@@ -67,7 +67,6 @@ module Gitlab
                                           }.merge!(@opts))
     end
 
-
     def pipeline_url
       namespace_project_build_url({
                                        namespace_id: @project.namespace,