The `rest_{$taxonomy}_collection_params` filter in 4.7 is incorrectly using
single quotes instead of double quotes, which means it is not working correctly
as a dynamic filter. This fixes the quotes around the filter name, and also
updates the docblocks for the other 3 similar filters for better conformance to
the documentation standards.
Props shazahm1hotmailcom, JPry, jnylen0.
Fixes#39300.
Built from https://develop.svn.wordpress.org/trunk@39621
git-svn-id: http://core.svn.wordpress.org/trunk@39561 1a063a9b-81f0-0310-95a4-ce76da25c4cd