Documentation whitespace improvement in bp-activity-functions.php

See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7406 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Inline docs improvements in Blogs component:

- bp-blogs-actions.php
- bp-blogs-activity.php
- bp-blogs-buddybar.php
- bp-blogs-cache.php
- bp-blogs-classes.php

See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7407 cdf35c40-ae34-48e0-9cc9-0c9da1808c22