Fix the `wp_count_attachments()` PHPDoc to reflect that it returns an object, not array.

See #25412.


git-svn-id: https://develop.svn.wordpress.org/trunk@27807 602fd350-edb4-49c9-b593-d223f7449a82
Convert `wp_editor()` default arguments documentation to a hash notation in the `_WP_Editors::parse_settings()` PHPDoc.

See #27566.


git-svn-id: https://develop.svn.wordpress.org/trunk@27808 602fd350-edb4-49c9-b593-d223f7449a82