Content-Type: text/html
Content-Length: 459

 
	 some <a href="/?a&b">html</a> code 
	 ^$b^(2+2^) 
	 \^\(\.\*\?\)\$ 
	 some <?dirty?> code 

 
	 some &lt;a href=&quot;/?a&amp;b&quot;&gt;html&lt;/a&gt; code 
	 ^$b^(2+2^) 
	 \^\(\.\*\?\)\$ 
	 some &lt;?dirty?&gt; code 

 
	 some &lt;a href=&quot;/?a&amp;b&quot;&gt;html&lt;/a&gt; code 
	 ^$b^(2+2^) 
	 \^\(\.\*\?\)\$ 
	 some <\?dirty\?> code 

 
	 some <a href="/?a&b">html</a> code 
	 $b(2+2) 
	 ^(.*?)$ 
	 some <?dirty?> code