line 1 column 1 - Warning: missing declaration line 6 column 1 - Warning: attribute with missing trailing quote mark line 6 column 1 - Warning: escaping malformed URI reference line 6 column 1 - Warning: illegal characters found in URI Info: Document content looks like HTML5 Tidy found 4 warnings and 0 errors! URIs must be properly escaped, they must not contain unescaped characters below U+0021 including the space character and not above U+007E. Tidy escapes the URI for you as recommended by HTML 4.01 section B.2.1 and XML 1.0 section 4.2.2. Some user agents use another algorithm to escape such URIs and some server-sided scripts depend on that. If you want to depend on that, you must escape the URI on your own. For more information please refer to https://www.w3.org/International/O-URL-and-ident.html About HTML Tidy: https://github.com/htacg/tidy-html5 Bug reports and comments: https://github.com/htacg/tidy-html5/issues Official mailing list: https://lists.w3.org/Archives/Public/public-htacg/ Latest HTML specification: https://html.spec.whatwg.org/multipage/ Validate your HTML documents: https://validator.w3.org/nu/ Lobby your company to join the W3C: https://www.w3.org/Consortium Do you speak a language other than English, or a different variant of English? Consider helping us to localize HTML Tidy. For details please see https://github.com/htacg/tidy-html5/blob/master/README/LOCALIZE.md