Remove some run-on sentences, also some comma splices, they were kind of annoying, they made BuddyPress more annoying to use, this is much better, thanks for using BuddyPress.

Props tharsheblows.
Fixes #5878.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@9190 cdf35c40-ae34-48e0-9cc9-0c9da1808c22