languages: html auto-indent: fix tests
http://bugs.activestate.com/show_bug.cgi?id=101600

- Get rid of non-headless-scintilla code
- Using inline markers for the empty start tag test

(integrated from komodo (trunk) change 83176 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14029 b87d16e7-d29f-4ee1-b5ec-817d645d335f