Fix lots of minor whitespace issues.

caschat.php

healthcheck.php

locallib.php

stack/answertest/at_general_cas.class.php

stack/answertest/controller.class.php

stack/answertest/numrelative.class.php

stack/answertest/simpletest/fixtures.class.php

stack/answertest/simpletest/test.at_general_cas.class.php

stack/answertest/stringsloppy.class.php

stack/cas/cassession.class.php

stack/cas/casstring.class.php

stack/cas/installhelper.class.php

stack/cas/simpletest/test.cassession.class.php

stack/options.class.php

stack/stringutil.class.php