function unescape(string) {
	      string = toString(string);
	      return (string && reHasEscapedHtml.test(string))
	        ? string.replace(reEscapedHtml, unescapeHtmlChar)
	        : string;
	    }
Converts `string`, as space separated words, to upper case.

@static
@memberOf _
@since 4.0.0
@category String
@param {string} [string=''] The string to convert.
@returns {string} Returns the upper cased string.
@example

_.upperCase('--foo-bar');
// => 'FOO BAR'

_.upperCase('fooBar');
// => 'FOO BAR'

_.upperCase('__foo_bar__');
// => 'FOO BAR'