fixed: Attributes actually cannot be augment-ed.

jnthn | Doc_Holliwood: Then that'd be a doc bug; we've never supported adding attributes with augment

Author: holli-holzer

doc/Language/variables.pod6

@@ -856,7 +856,7 @@ given scope will effectively introduce a separate variable.
 
 =head2 The C<augment> declarator
 
-With C<augment>, you can add attributes and methods to existing classes and
+With C<augment>, you can add methods, but not attributes, to existing classes and
 grammars, provided you activated the C<MONKEY-TYPING> pragma first.
 
 Since classes are usually C<our> scoped, and thus global, this means modifying