line 8 column 12 - Warning: replacing unexpected b with </b>
line 8 column 35 - Warning: inserting implicit <i>
line 9 column 13 - Warning: replacing unexpected tt with </tt>
line 9 column 34 - Warning: inserting implicit <b>
line 10 column 15 - Warning: replacing unexpected i with </i>
line 10 column 38 - Warning: inserting implicit <b>
Info: Doctype given is "-//W3C//DTD XHTML 1.0 Transitional//EN"
Info: Document content looks like XHTML 1.0 Strict
Tidy found 6 warnings and 0 errors!

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/
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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