Clarify difference between $¢ and $/, refs #1760

doc/Type/Match.pod6

@@ -33,7 +33,13 @@ B<Note>: This feature works only from Perl 6 version 2018.02. It would have
 returned C<Nil> with any previous version. Alternatively and prior to that
 version, you could use C<$/> which, inside the regex, has the same value:
 
-    m: '123' ~~ / (\d) { say $0; say $/; } \d+ /; # OUTPUT: «｢1｣␤｢1｣␤ 0 => ｢1｣␤»
+    '123' ~~ / (\d) { say $0; say $/; } \d+ /; # OUTPUT: «｢1｣␤｢1｣␤ 0 => ｢1｣␤»
+
+The main difference between C<$/> and C<$¢> is scope: the latter only has a
+value inside the regex:
+
+    '123' ~~ / (\d) { say $/; say $¢; } \d+ /; # OUTPUT: «｢1｣␤ 0 => ｢1｣␤｢1｣␤ 0 => ｢1｣␤»
+    say "¢ → ", $¢, "/ is $/"; ; # OUTPUT: «¢ → Nil/ is 123␤»
 
 Submatches are also C<Match> objects (or lists of C<Match> objects,
 if the corresponding regex was quantified), so each match object