Link to traps anyway

It's OK to have small pieces of information copied. However, traps
section is a bit more elaborate on another issue (deepmap semantics),
so a link is appropriate.

Author: AlexDaniel

doc/Language/operators.pod6

@@ -621,8 +621,10 @@ X<Hyper method call operator>. Will call a method on all elements of a C<List> o
     say @a».&foo;                     # So we can pretend to have a method call with a sub that got a good first positional argument.
     say @a».&{ .ord};                 # Blocks have an implicit positional arguments that lands in $_. The latter can be omitted for method calls.
 
-Take care to avoid a common mistake of expecting side-effects to occur in order. The following
-C<say> is B<not> guaranteed to produce the output in order:
+Take care to avoid a
+L<common mistake|/language/traps#Using_»_and_map_interchangeably> of expecting
+side-effects to occur in order. The following C<say> is B<not>
+guaranteed to produce the output in order:
 
     =begin code :skip-test
     @a».say;  # WRONG! Could produce a␤b␤c␤ or c␤b␤a␤ or any other order