change doc based on review feedback

Author: erik-krogh

javascript/ql/src/Security/CWE-079/ExceptionXss.qhelp

@@ -21,7 +21,7 @@ references.
 <example>
 <p>
 The following example shows an exception being written directly to the document, 
-and this exception can potentially be influenced the page URL, 
+and this exception can potentially be influenced by the page URL, 
 leaving the website vulnerable to cross-site scripting.
 </p>
 <sample src="examples/ExceptionXss.js" />

javascript/ql/src/Security/CWE-079/ExceptionXss.ql

@@ -1,7 +1,7 @@
 /**
  * @name Client-side cross-site scripting through exception
  * @description User input being part of an exception allows for 
- *              cross-site scripting if that exception ends as input
+ *              cross-site scripting if that exception is written
  *              to the DOM.  
  * @kind path-problem
  * @problem.severity error