Update php & html tests in preformatted test file to reflect changes in parser

This test file examines the handler.  The decisions on htmlok & phpok settings have been
moved from the handler to the renderer changing the nature of the test that can be
carried out on these syntax modes in this file.

Refer other patch adding xhtml renderer tests for 'phpok' & 'htmlok' and their
associated syntax modes in parser_preformatted.test.php

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