Fix JSHint errors in 5 files.

props seanchayes.
fixes #26015, #26020, #26019, #26034, #26022.

Built from https://develop.svn.wordpress.org/trunk@26200


git-svn-id: http://core.svn.wordpress.org/trunk@26108 1a063a9b-81f0-0310-95a4-ce76da25c4cd