old_contents: describe('init()', function() {
    it('should throw exception on missing arguments', function() {
      var fn = dodgercms.s3.init;
      chai.expect(fn).to.throw('Missing several arguments');
    });
  });
new_contents: describe('init()', function() {
    it('should throw exception on missing arguments', function() {
      var fn = dodgercms.s3.init;
      chai.expect(fn).to.throw('Missing several arguments Xs');
    });
  });
subject: add X to message