Content-Type: text/html
Content-Length: 887

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

code coverage tests:
2. Exception type: parser.runtime,
Source: unsafe_env_name,
Comment: not safe environment variable
3. Exception type: parser.runtime,
Source: exec,
Comment: file name must be specified
4. Exception type: parser.runtime,
Source: exec,
Comment: stdin parameter must be string or file
5. Exception type: parser.runtime,
Source: exec,
Comment: param must be string or table