Change output line to match exactly.

Author: fluca1978

doc/Language/regexes.pod6

@@ -843,9 +843,9 @@ an element of the resulting L<Match> object:
 
     my $str =  'number 42';
     if $str ~~ /'number ' (\d+) / {
-        say "The number is $0";         # the number is 42
+        say "The number is $0";         # OUTPUT: The number is 42
         # or
-        say "The number is $/[0]";      # the number is 42
+        say "The number is $/[0]";      # OUTPUT: The number is 42
     }
 
 Pairs of parentheses are numbered left to right, starting from zero.