line 2 column 1 - Info: value for attribute "width" missing quote marks
line 2 column 1 - Info: value for attribute "height" missing quote marks
line 2 column 1 - Warning: missing <!DOCTYPE> declaration
line 2 column 1 - Warning: inserting implicit <body>
line 3 column 17 - Warning: <img> discarding newline in URI reference
line 2 column 1 - Warning: inserting missing 'title' element
line 3 column 17 - Warning: <img> escaping malformed URI reference
line 3 column 17 - Warning: <img> illegal characters found in URI
line 3 column 17 - Warning: <img> lacks "alt" attribute
Info: Document content looks like HTML5
Tidy found 7 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

The alt attribute should be used to give a short description
of an image; longer descriptions should be given with the
longdesc attribute which takes a URL linked to the description.
These measures are needed for people using non-graphical browsers.

For further advice on how to make your pages accessible
see https://www.w3.org/WAI/GL.
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
