Fix failing test case for issue 124

The test failed to search-forward to the heredoc and instead matched the
string 'heredoc' inside the comment.

Signed-off-by: Eric James Michael Ritz <ejmr@plutono.com>
Add Joris Steyn to the list of contributors
Enable case sensitive search in 'with-php-mode-test'

Signed-off-by: Eric James Michael Ritz <ejmr@plutono.com>
Add regression test of #144

Signed-off-by: Eric James Michael Ritz <ejmr@plutono.com>