Fix encoding of whitespace characters in shortcode tests for #6562.

Fixes #6562.


git-svn-id: https://unit-tests.svn.wordpress.org/trunk@1321 4a5a2adb-35eb-4268-9a1b-fe04a4134342
Add back `@ticket` flags for whitespace shortcodes tests.

See [UT1321], #6562.

Props duck_.


git-svn-id: https://unit-tests.svn.wordpress.org/trunk@1322 4a5a2adb-35eb-4268-9a1b-fe04a4134342