The `assertEqualHTML()` method makes tests resilient to irrelevant syntactic changes in HTML output, focusing on semantic equivalence rather than exact string matching. Developed in https://github.com/WordPress/wordpress-develop/pull/10727. Follow up to [61394], [61391]. Props jonsurrell, cbravobernal. See #64225. Built from https://develop.svn.wordpress.org/trunk@61478 git-svn-id: http://core.svn.wordpress.org/trunk@60790 1a063a9b-81f0-0310-95a4-ce76da25c4cd