line 1 column 1 - Warning: missing declaration
line 2 column 1 - Warning: inserting implicit
line 4 column 7 - Warning: missing before
line 2 column 1 - Warning: The summary attribute on the element is obsolete in HTML5
Info: Document content looks like HTML5
Tidy found 4 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: http://dev.w3.org/html5/spec-author-view/
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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