Whitespace improvements for bp_core_fetch_avatar() docblock

See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7428 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Improve inline docs in bp-blogs-template.php

See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7429 cdf35c40-ae34-48e0-9cc9-0c9da1808c22