code: function (str) {
      if (str.indexOf('Blockly.Msg.') !== 0) return false;
      assert.notStrictEqual(str.indexOf('";'), str.length - 2, `[${str}] uses double quoted string, should use single quotes.`);
      if (str.indexOf("';") !== str.length - 2) return false;
      return true;
  }
docs: Match function