Several filters were introduced to the render_block method since the initial implementation of the block-renderer/ endpoints, causing the output of those endpoints to diverge from the rendered content of blocks on the frontend. Props kadamwhite, TimothyBlynJacobs, miinasikk. Fixes #49387. Built from https://develop.svn.wordpress.org/trunk@47360 git-svn-id: http://core.svn.wordpress.org/trunk@47147 1a063a9b-81f0-0310-95a4-ce76da25c4cd