Add issue edited timestamp

app/helpers/issues_helper.rb

@@ -62,6 +62,19 @@ module IssuesHelper
     ''
   end
 
+  def issue_timestamp(issue)
+    # Shows the created at time and the updated at time if different
+    ts = "#{time_ago_with_tooltip(issue.created_at, 'bottom', 'note_created_ago')}"
+    if issue.updated_at != issue.created_at
+      ts << capture_haml do
+        haml_tag :small do
+          haml_concat " (Edited #{time_ago_with_tooltip(issue.updated_at, 'bottom', 'issue_edited_ago')})"
+        end
+      end
+    end
+    ts.html_safe
+  end
+
   # Checks if issues_tracker setting exists in gitlab.yml
   def external_issues_tracker_enabled?
     Gitlab.config.issues_tracker && Gitlab.config.issues_tracker.values.any?

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

@@ -39,7 +39,7 @@
         Open
 
     .creator
-      Created by #{link_to_member(@project, @issue.author)} #{time_ago_with_tooltip(@issue.created_at)}
+      Created by #{link_to_member(@project, @issue.author)} #{issue_timestamp(@issue)}
 
   %h4.title
     = gfm escape_once(@issue.title)