Twenty Thirteen: fix typo in browser transition prefix. Fixes #23568, props Jayjdk.


git-svn-id: https://core.svn.wordpress.org/trunk@23464 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: style the `hr` element. Fixes #23529.


git-svn-id: https://core.svn.wordpress.org/trunk@23465 1a063a9b-81f0-0310-95a4-ce76da25c4cd