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<!DOCTYPE html>
<meta charset=utf-8>
<title>invalid formaction: path-leading-colon-chars-backslash</title>
<button formaction=":foo.com\"></button>
<!DOCTYPE html>
<meta charset=utf-8>
<title>invalid formaction: path-leading-colon-chars-backslash</title>
<button formaction=":foo.com\"></button>