line 21 column 4 - Warning: missing <dd>
line 21 column 4 - Warning: missing </div> before <dt>
line 22 column 5 - Warning: inserting implicit <dl>
line 22 column 5 - Warning: missing </dl> before </div>
line 17 column 21 - Warning: trimming empty <dt>
line 24 column 21 - Warning: trimming empty <dt>
Info: Doctype given is "-//W3C//DTD HTML 4.01//EN"
Info: Document content looks like HTML Proprietary
Tidy found 6 warnings and 0 errors!

One or more empty elements were present in the source document but
dropped on output. If these elements are necessary or you don't want
this behavior, then consider setting the option "drop-empty-elements"
to no.

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