Clarifications for RolePunning refs #1306

Author: JJ

doc/Type/Metamodel/RolePunning.pod6

@@ -4,11 +4,12 @@
 
 =SUBTITLE Metaobject that supports I<punning> of roles.
 
-    role Metamodel::RolePunning {}
+    role Perl6::Metamodel::RolePunning {}
 
 Implements the ability to create objects from C<Role>s without the intermediate
 need to use a class. Not intended to be used directly (will in fact error if
-it's C<use>d), but via punning of roles, as below.
+it's C<use>d), but via punning of roles, as below. This is also Rakudo specific
+and not part of the spec.
 
 =for code
 role A {