* Add a post ID argument to the_content(), get_the_content(), the_remaining_content(), and get_the_remaining_content().
* Pass the post ID to the the_content filter.
* Remove the format_pages global.
* Declare format_content and split_content as vars in WP_Post.
* phpdoc for the the_content filter that documents the new ID argument and denotes it as not-so-portable.
Props gcorne, DrewAPicture, duck_, aaroncampbell
see #24330
git-svn-id: https://develop.svn.wordpress.org/trunk@24301 602fd350-edb4-49c9-b593-d223f7449a82