KNL-1043 Minor docs update

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@123377 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1061 adding default scanner handling for data-mathml tags



git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@123378 66ffb92e-73f9-0310-93c1-f5514f145a0a