Update qldoc

Author: luchua-bc

java/ql/src/experimental/Security/CWE/CWE-094/ScriptInjection.qhelp

@@ -4,7 +4,7 @@
 <qhelp>
 
 <overview>
-<p>The Java Scripting API has been available since the release of Java 6, which allows
+<p>The Java Scripting API has been available since the release of Java 6. It allows
   applications to interact with scripts written in languages such as JavaScript. It serves
   as an embedded scripting engine inside Java applications which allows Java-to-JavaScript
   interoperability and provides a seamless integration between the two languages. If an 
@@ -21,7 +21,7 @@
 </recommendation>
 
 <example>
-<p>The following code could execute random JavaScript code in <code>ScriptEngine</code></p>
+<p>The following code could execute user-supplied JavaScript code in <code>ScriptEngine</code></p>
 <sample src="ScriptEngine.java" />
 <sample src="NashornScriptEngine.java" />