Merge pull request #1881 from gfldex/patch-12

return type constraints also work for pointy blocks

Well, `htmlify.p6`is what is going to process it anyway... Having a `type` preffix is also a heuristic, because it's where it goes now, as processed with htmlify.p6. Be that as it may, that's fair enough, so I'll accept it anyway. If we change this to some other thing it will go to the pile of links that have to be changed.

Author: JJ

doc/Type/Signature.pod6

@@ -355,7 +355,7 @@ others, you need to use the long version:
 
 =head3 X«Constraining Return Types|-->;returns»
 
-There are multiple ways to constrain return types on a sub or method. All versions below
+There are multiple ways to constrain return types on a L<Routine|/type/Routine>. All versions below
 are currently valid and will force a type check on successful execution of a routine.
 
 L<C<Nil>|/type/Nil> and L<C<Failure>|/type/Failure> are always allowed as return types,