Formatting: New test cases for a few core formatting functions which call htmlspecialchars without providing any charset info.

As of PHP5.4 the default charset for htmlspecialchars is changed to UTF-8 which means that iso-8859-1 data gets eaten.

See: #23688


git-svn-id: https://unit-tests.svn.wordpress.org/trunk@1243 4a5a2adb-35eb-4268-9a1b-fe04a4134342