line 1 column 1 - Warning: missing declaration line 796 column 2 - Warning: named entity ' only defined in XML/XHTML line 796 column 28 - Warning: named entity ' only defined in XML/XHTML line 799 column 17 - Warning: unescaped & or unknown entity "&foo" line 799 column 32 - Warning: unescaped & or unknown entity "&foo" Info: Document content looks like HTML5 5 warnings, 0 errors were found! About HTML Tidy: https://github.com/htacg/tidy-html5 Bug reports and comments: https://github.com/htacg/tidy-html5/issues Or send questions and comments to: https://lists.w3.org/Archives/Public/public-htacg/ Latest HTML specification: http://dev.w3.org/html5/spec-author-view/ Validate your HTML documents: http://validator.w3.org/nu/ Lobby your company to join the W3C: http://www.w3.org/Consortium