src/third_party/web_platform_tests/conformance-checkers/html/attributes/data/no-characters-after-hyphen-novalid.html - cobalt - Git at Google

 <!doctype html>
 <meta charset=utf-8>
 <title>starts with the string "data-", has at least one character after the hyphen, is XML-compatible, and contains no uppercase ASCII letters</title>
 <p data-=""> <!-- no characters after the hypen -->
	<!doctype html>
	<meta charset=utf-8>
	<title>starts with the string "data-", has at least one character after the hyphen, is XML-compatible, and contains no uppercase ASCII letters</title>
	<p data-=""> <!-- no characters after the hypen -->