Comment formatting.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5176 2fea6a4d-a838-0410-917b-93a53c48e9d2
Pass raw $pagetitle to 'admin_side > html_title' members.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5177 2fea6a4d-a838-0410-917b-93a53c48e9d2
Document 'admin_side > html_title' event.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5178 2fea6a4d-a838-0410-917b-93a53c48e9d2