Fix qhelp & ql-for-ql errors

Author: joefarebrother

java/ql/lib/semmle/code/java/security/WebviewDubuggingEnabledQuery.qll

@@ -22,7 +22,7 @@ private predicate isDebugCheck(Expr ex) {
   )
 }
 
-/** Configuration to find instances of `setWebContentDebuggingEnabled` called with `true` values. */
+/** A configuration to find instances of `setWebContentDebuggingEnabled` called with `true` values. */
 class WebviewDebugEnabledConfig extends DataFlow::Configuration {
   WebviewDebugEnabledConfig() { this = "WebviewDebugEnabledConfig" }
 

java/ql/src/Security/CWE/CWE-489/WebviewDebuggingEnabled.qhelp

@@ -7,7 +7,7 @@
 <p>The <code>WebView.setWebContentsDebuggingEnabled</code> method enables or disables the contents of any <code>WebView</code> in the application to be debugged.</p>
 
 <p>Enabling debugging featues could allow for additional entry points or leaking sensitive information. 
-As such, debugging should only be anabled during development, and disabled during production builds.
+As such, debugging should only be anabled during development, and disabled during production builds.</p>
 </overview>
 <recommendation>
 Ensure that debugging features are not enabled during production builds. 

java/ql/src/Security/CWE/CWE-489/WebviewDebuggingEnabled.ql

@@ -12,7 +12,6 @@
 
 import java
 import semmle.code.java.security.WebviewDubuggingEnabledQuery
-import semmle.code.java.dataflow.DataFlow
 import DataFlow::PathGraph
 
 from WebviewDebugEnabledConfig conf, DataFlow::PathNode source, DataFlow::PathNode sink