[Positional]: EnumMap isn't Positional; other minor tweaks and fixes.

Author: pmichaud

lib/Positional.pod

@@ -4,8 +4,8 @@
 
     role Positional { ... }
 
-Role for objects which support indexing them using C<cirumfix:«[ ]»> (usually
-array-like objects). Example objects with Positional role include L<Array>,
-L<Range>, L<Buf>, L<EnumMap> and L<PairMap>.
+Role for objects which support indexing them using C<circumfix:«[ ]»> 
+(usually list-like objects).  Example types with Positional role 
+include L<Parcel>, L<List>, L<Array>, L<Range>, and L<Buf>.
 
 =end pod