wp-date
`wp-date` recently added the `datetimeAbbreviated` format, but the config wasn't sending it on page load. Props pento. Merges [43818] to trunk. Fixes #45158. Built from https://develop.svn.wordpress.org/trunk@44162 git-svn-id: http://core.svn.wordpress.org/trunk@43992 1a063a9b-81f0-0310-95a4-ce76da25c4cd