Merge branch 'fix-flakey-user-comment-on-issue' into 'master'

Fix flakey time-sensitive user comment on issue test

See merge request gitlab-org/gitlab-ce!19786

spec/features/projects/issues/user_comments_on_issue_spec.rb

@@ -31,11 +31,14 @@
     end
 
     it "adds comment with code block" do
-      comment = "```\nCommand [1]: /usr/local/bin/git , see [text](doc/text)\n```"
+      code_block_content = "Command [1]: /usr/local/bin/git , see [text](doc/text)"
+      comment = "```\n#{code_block_content}\n```"
 
       add_note(comment)
 
-      expect(page).to have_content(comment)
+      wait_for_requests
+
+      expect(page.find('pre code').text).to eq code_block_content
     end
   end