(#15081) Update create_resources() inline documentation

Without this patch the create_resources function inline documentation is
not up to date with the patch to enable creation of virtual and exported
resources.

This patch fixes the problem by including examples of how to create
virtual and exported resources using the create_resources function.

Author: Jeff McCune

lib/puppet/parser/functions/create_resources.rb

@@ -31,6 +31,17 @@
 
     This function can be used to create defined resources and classes, as well
     as native resources.
+
+    Virtual and Exported resources may be created by prefixing the type name
+    with @ or @@ respectively.  For example, the $myusers hash may be exported
+    in the following manner:
+
+        create_resources("@@user", $myusers)
+
+    The $myusers may be declared as virtual resources using:
+
+        create_resources("@user", $myusers)
+
   ENDHEREDOC
   raise ArgumentError, ("create_resources(): wrong number of arguments (#{args.length}; must be 2 or 3)") if args.length < 2 || args.length > 3