[e] (0) Try to clarify how UAs can abort at parse errors.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=21831
Affected topics: HTML Syntax and Parsing

git-svn-id: http://svn.whatwg.org/webapps@7912 340c8d12-0b0e-0410-8428-c7bf67bfef74
[e] (0) Fix some typos or copypasta.
Affected topics: HTML, Video and Audio

git-svn-id: http://svn.whatwg.org/webapps@7913 340c8d12-0b0e-0410-8428-c7bf67bfef74