gitlabhq/app/views/notes/_create_diff_note.js.haml

- if note.valid?
  :plain
    // hide and reset the form
    $(".per_line_form").hide();
    $('.line-note-form-holder textarea').val("");

    // find the reply button for this line
    // (might not be there if this is the first note)
    var trRpl = $(".js-note-add-to-diff-line[data-noteable-type='#{note.noteable_type}'][data-noteable-id='#{note.noteable_id}'][data-line-code='#{note.line_code}']").closest("tr");
    if (trRpl.size() == 0) {
      // find the commented line ...
      var trEl = $(".#{note.line_code}").parent();
      // ... and insert the note and the reply button after it
      trEl.after("#{escape_javascript(render "notes/diff_notes_with_reply", notes: [note])}");
    } else {
      // instert new note before reply button
      trRpl.before("#{escape_javascript(render "notes/diff_note", note: note)}");
    }