line 1 column 1 - Warning: missing <!DOCTYPE> declaration
line 6 column 14 - Warning: <spanstyle> unexpected or duplicate quote mark
line 6 column 14 - Warning: <spanstyle> attribute with missing trailing quote mark
line 6 column 14 - Error: <spanstyle> is not recognized!
line 6 column 14 - Warning: discarding unexpected <spanstyle>
line 6 column 44 - Warning: discarding unexpected </span>
line 6 column 52 - Info: value for attribute "href" missing quote marks
line 3 column 3 - Warning: blank 'title' element
line 6 column 52 - Warning: <a> illegal characters found in URI
Info: Document content looks like HTML5
Tidy found 7 warnings and 1 error!

This document has errors that must be fixed before
using HTML Tidy to generate a tidied up version.

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