Merge branch 'qa-fix-failing-snippet-tests' into 'master'

Fix failing clone_push_pull snippet tests

See merge request gitlab-org/gitlab!65613

qa/qa/page/dashboard/snippet/edit.rb

@@ -23,7 +23,8 @@ module QA
           end
 
           def add_to_file_content(content)
-            text_area.set content
+            text_area.click
+            text_area.send_keys(:home, content) # starts in the beginning of the line
             text_area.has_text?(content) # wait for changes to take effect
           end