SAK-23465 - added documentation for gradebook.class.average.decimal.places to default.sakai.properties.


git-svn-id: https://source.sakaiproject.org/svn/config/trunk@122395 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-23465 - improved the text of the description and extra line break for easier reading.


git-svn-id: https://source.sakaiproject.org/svn/config/trunk@122400 66ffb92e-73f9-0310-93c1-f5514f145a0a