The Array.prototype.fill function is an ES6 function.

The Array.prototype.find function is an ES6 function.

ES6 numeric literals

Fix tautological pattern in tests

In neglecting to assert the type of error thrown (or that any error was
thrown at all), these tests cannot fail. Refactor the tests to use the
`assert.throws` helper method, which takes these details into
consideration.

Add tests for Proxy

A number of Array.prototype.find tests were missing a feature specification.

One of the Array.prototype.fill tests specifies an es5id. Changed to an es6id.

Use the more common array syntax for includes

Fix monkey yaml's handling of carriage return

monkeyYaml didn't split lines correctly leading to \r in resulting
values.

Fixes #295

Insert omitted `negative` tag

Remove `$FAIL` function

This test exercises an early error, so it should be declared with the
`negative` tag.

This function is equivalent to `$ERROR` (which is automatically included
in test environments). Remove the harness file that defines the
function, remove references to the file from test `includes` lists, and
update scripts to instead invoke the `$ERROR` function.

Fixed testing deletion of an environment object.

Remove remaining includes for `assert.js` helper

No need to include asserts.js

The previous description of the 11.4.1-4.a-5 test case implied that an environment object could not be deleted while inside a with. However, the actual test was to test whether the variable declaration could be deleted. The description has been updated to better reflect this.