Expand link shortcut tests in XSS issue 604 case

Author: Crozzers

test/tm-cases/issue603_xss.html

@@ -1,4 +1,6 @@
 <p><img src="code&gt;&quot; onerror=alert()//&lt;/code" alt="" /></p>
 
 <p><img src="&quot; onerror=alert()//" alt="" />
-<a href="#"></a></p>
+<a href="#"></a>
+<img src="`&quot; onerror=alert()//`" alt="" />
+<img src="&lt;code&gt;&quot; onerror=alert()//&lt;code&gt;" alt="" /></p>

test/tm-cases/issue603_xss.text

@@ -3,6 +3,10 @@
 
 ![][XSS]
 [][XSS]
+![][XSS2]
+![][XSS3]
 
 
 [XSS]: " onerror=alert()//
+[XSS2]: `" onerror=alert()//`
+[XSS3]: <code>" onerror=alert()//<code>