src/third_party/web_platform_tests/conformance-checkers/html/elements/form/action/port-leading-colon-bracket-colon-novalid.html - cobalt - Git at Google

 <!DOCTYPE html>
 <meta charset=utf-8>
 <title>invalid action: port-leading-colon-bracket-colon</title>
 <form action="http://2001::1]:80"></form>
	<!DOCTYPE html>
	<meta charset=utf-8>
	<title>invalid action: port-leading-colon-bracket-colon</title>
	<form action="http://2001::1]:80"></form>