- is($txtl_html, $good);
- isnt($txtl_html, q{<p><a href="https://en.wikipedia.org/wiki/G&ouml;del,_Escher,_Bach">Gödel, Escher, Bach</a></p>});
+ like($txtl_html, $good);
+ unlike($txtl_html, qr{<p><a href="https://en\.wikipedia\.org/wiki/G&ouml;del,_Escher,_Bach">Gödel, Escher, Bach</a></p>}i);