testing/web-platform/tests/conformance-checkers/html/elements/button/formaction/userinfo-username-contains-pile-of-poo-novalid.html


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<!DOCTYPE html>
<meta charset=utf-8>
<title>invalid formaction: userinfo-username-contains-pile-of-poo</title>
<button formaction="http://💩:foo@example.com"></button>