Codebase Browser
chromium
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chromium/third_party/blink/web_tests/http/tests/devtools/search/resources/search.html 

<html>
<head>
<link href="search.css" rel="stylesheet" type="text/css">
<script src="search.js"></script>
<script>window.eval("function searchTestUniqueString() {}");</script>
<body>
<div>searchTestUniqueString</div>
<div>other text</div>
<!-- searchTestUniqueString -->
<div>some other text</div>
<div id="searchTestUniqueString">div text</div>
</body>
</html>

<!-- searchTestUnique space String -->