Formatting: Update `autop()` to match `wpautop()`.
 changed the behaviour of `wpautop()` , so it's nice to change `autop()` to match. Interestingly, this change isn't necessary for the functionality to work - #4857 didn't affect content that had been run through `autop()` at some point, as `autop()` would add a single line break before block elements, then `wpautop()` would later add a second line break, making it work correctly. Props nacin for finding out about  on Twitter, and DMing me to remind me to review `autop()`. See #4857. Built from https://develop.svn.wordpress.org/trunk@38594 git-svn-id: http://core.svn.wordpress.org/trunk@38537 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Showing with 3 additions and 3 deletions