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A spec-proposal-compliant `String.prototype.trimRight` shim. Invoke its "shim" method to shim `String.prototype.trimRight` if it is unavailable.

This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](http://www.ecma-international.org/ecma-262/6.0/#sec-object.assign). In an ES6 environment, it will also work properly with `Symbol`s.

Most common usage:
```js
var trimRight = require('string.prototype.trimright');

assert(trimRight(' \t\na \t\n') === 'a \t\n');

if (!String.prototype.trimRight) {
	trimRight.shim();
}

assert(trimRight(' \t\na \t\n ') === ' \t\na \t\n '.trimRight());
```

## Tests
Simply clone the repo, `npm install`, and run `npm test`

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