Adds information on versions closes #1760 again

Author: JJ

doc/Type/Match.pod6

@@ -13,20 +13,28 @@ in the original string, and a payload referred to as I<AST> (abstract syntax
 tree), which can be used to build data structures from complex regexes and
 grammars.
 
-The last match is also stored in the X<C<$¢>> variable:
+The last match is also stored in the X<C<$¢>> C<Match> object:
 
     my $c;
     'abc' ~~ /.$${ $c = $¢ }/;
     say $c; # OUTPUT: «｢c｣␤»
 
 In this case, we are running the code among curly braces when the match occurs,
 in this case the last letter in the string; C<$c> gets the value of the cursor
-C<$¢>, which contains the C<Match>. This C<$¢> offers a way of capturing the Match inside a regular expression; if you are not going to use it inside that you can simply use L<C<$/>|/syntax/$$SOLIDUS>
+C<$¢>, which contains the C<Match>. This C<$¢> offers a way of capturing the
+Match inside a regular expression; if you are not going to use it inside that
+you can simply use L<C<$/>|/syntax/$$SOLIDUS>
 
     my $c; 'camelia' ~~ /<[ l m ]> {$c = $¢}/;
     say $c; # OUTPUT: «｢m｣␤»
     say $/; # OUTPUT: «｢m｣␤»
 
+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｣␤»
+
 Submatches are also C<Match> objects (or lists of C<Match> objects,
 if the corresponding regex was quantified), so each match object
 can be seen as the root of a tree of match objects.