Use "opened by" instead of "created by" in issue/MR header, like in list

app/views/projects/issues/show.html.haml

@@ -11,7 +11,8 @@
           Open
       %span.issue-id Issue ##{@issue.iid}
       %span.creator
-        · created by #{link_to_member(@project, @issue.author, size: 24)}
+        ·
+        opened by #{link_to_member(@project, @issue.author, size: 24)}
         ·
         = time_ago_with_tooltip(@issue.created_at, placement: 'bottom', html_class: 'issue_created_ago')
         - if @issue.updated_at != @issue.created_at

app/views/projects/merge_requests/show/_mr_title.html.haml

@@ -4,7 +4,7 @@
   %span.issue-id Merge Request ##{@merge_request.iid}
   %span.creator
     ·
-    created by #{link_to_member(@project, @merge_request.author, size: 24)}
+    opened by #{link_to_member(@project, @merge_request.author, size: 24)}
     ·
     = time_ago_with_tooltip(@merge_request.created_at)
     - if @merge_request.updated_at != @merge_request.created_at