Add missing case for counterexamples (#8923)

Author: JPWilli

xml/System.Net/HttpWebRequest.xml

@@ -3991,6 +3991,8 @@ The GetHashCode method returns a hash code of the web request. This value can be
 
  `http://www.contoso.com/secondpath/`
 
+ `http://www.contoso.com/firstpath/thirdpath/`
+
  If the client request to a specific <xref:System.Uri> is not successfully authenticated, the request uses standard authentication procedures.
 
  With the exception of the first request, the <xref:System.Net.WebRequest.PreAuthenticate%2A> property indicates whether to send authentication information with subsequent requests to a <xref:System.Uri> that matches the specific <xref:System.Uri> up to the last forward slash without waiting to be challenged by the server.