Code cleanup: RuboCop: Rails/Presence

git-svn-id: http://svn.redmine.org/redmine/trunk@18291 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/issues_helper.rb

@@ -573,7 +573,7 @@ module IssuesHelper
 
     case user_default_tab
     when 'last_tab_visited'
-      cookies['history_last_tab'].present? ? cookies['history_last_tab'] : 'notes'
+      cookies['history_last_tab'].presence || 'notes'
     when ''
       'notes'
     else