[e] (0) Reframe the <img> rendering section for clarity
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=23443
Affected topics: Rendering

git-svn-id: http://svn.whatwg.org/webapps@8280 340c8d12-0b0e-0410-8428-c7bf67bfef74