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env and args tainting tests:
1. =
	 some <a href="/?a&b">html</a> code 
	 _2A _3F _22 _7C 
	 some  <?dirty?>  code  trailing whitespace here ->   =
2. ="args" "
	 some &lt;a href=&quot;/?a&amp;b&quot;&gt;html&lt;/a&gt; code 
	 _2A _3F _22 _7C 
	 some  <?dirty?>  code  trailing whitespace here ->   " =
3. ="args" ""quo ted"" "-opt ion" =
4. ="args" "1^ 2& 3` 4< 5> 6% 7! 8" 9| 10( 11) 12; 13= 14* 15? 16\ 17! 18[ 19] 20'" =
5. ="args" "un"quo ted"" =
6. ="args" "strange: 
 - enter?" =