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// tag: '<a href="foo.html">'
//
// ex. usage: `wrapWithHtmlIf('<a href="foo.html">', 'Hello World', function() { return true });`
// output: '<a href="foo.html">Hello World</a>'
var wrapWithHtmlIf = function(tag, content, testCb) {
	if(testCb()) {
		return tag + content + '</' + tag.match(/<(\w*?)(?:\s|\>)/)[1] + '>';
	}

	return content;
}