Add w3c html tidy

third_party/tidy/gdoc.h

@@ -0,0 +1,21 @@
+#ifndef __GDOC_H__
+#define __GDOC_H__
+#include "third_party/tidy/forward.h"
+/* clang-format off */
+
+/* gdoc.h -- clean up html exported by Google Docs
+
+  (c) 2012 (W3C) MIT, ERCIM, Keio University
+  See tidy.h for the copyright notice.
+
+  - strip the script element, as the style sheet is a mess
+  - strip class attributes
+  - strip span elements, leaving their content in place
+  - replace <a name=...></a> by id on parent element
+  - strip empty <p> elements
+
+*/
+
+void TY_(CleanGoogleDocument)( TidyDocImpl* doc );
+
+#endif /* __GDOC_H__ */