Use issue editor as cross reference comment author when issue is edited with a new mention.

CHANGELOG

@@ -12,6 +12,7 @@ v 8.2.0 (unreleased)
   - Use git follow flag for commits page when retrieve history for file or directory
   - Show merge request CI status on merge requests index page
   - Fix: 500 error returned if destroy request without HTTP referer (Kazuki Shimizu)
+  - Use issue editor as cross reference comment author when issue is edited with a new mention.
 v 8.1.1
   - Fix cloning Wiki repositories via HTTP (Stan Hu)

app/services/issues/update_service.rb

@@ -35,7 +35,7 @@ module Issues
           create_title_change_note(issue, issue.previous_changes['title'].first)
         end
-        issue.create_new_cross_references!
+        issue.create_new_cross_references!(current_user)
         execute_hooks(issue, 'update')
       end

app/services/merge_requests/update_service.rb

@@ -59,7 +59,7 @@ module MergeRequests
           merge_request.mark_as_unchecked
         end
-        merge_request.create_new_cross_references!
+        merge_request.create_new_cross_references!(current_user)
         execute_hooks(merge_request, 'update')
       end

app/services/notes/update_service.rb

@@ -4,7 +4,7 @@ module Notes
       return note unless note.editable?
       note.update_attributes(params.merge(updated_by: current_user))
-      note.create_new_cross_references!
+      note.create_new_cross_references!(current_user)
       note.reset_events_cache
       note