fix output example, pippo++

Author: moritz

lib/Type/Cool.pod

@@ -503,7 +503,7 @@ If the C<$from> parameter is a L<Callable|/type/Callable>, it is called with
 the number of chars in the string as argument. This allows easy indexing
 relative to the end:
 
-    say 20151224.substr(*-2);       # 12
+    say 20151224.substr(*-2);       # 24
 
 =head2 method IO