function unescape(string) {
      string = toString(string);
      return (string && reHasEscapedHtml.test(string))
        ? string.replace(reEscapedHtml, unescapeHtmlChar)
        : string;
    }
The inverse of `_.escape`; this method converts the HTML entities
`&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
their corresponding characters.

**Note:** No other HTML entities are unescaped. To unescape additional
HTML entities use a third-party library like [_he_](https://mths.be/he).

@static
@memberOf _
@since 0.6.0
@category String
@param {string} [string=''] The string to unescape.
@returns {string} Returns the unescaped string.
@example

_.unescape('fred, barney, &amp; pebbles');
// => 'fred, barney, & pebbles'