For https://en.wikipedia.org/wiki/Wikipedia_talk:AutoWikiBrowser/Bugs#.22Fixing.22_header_in_formatted_text.
Assume that indented text that may look like a header, is not actually a header if the middle of it has ==

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@9950 5227b50d-9349-4574-b055-4b0a7525e11c