Reword about ~$/ vs $/.Str.

Link to the match object.

Author: fluca1978

doc/Language/5to6-perlvar.pod6

@@ -317,9 +317,11 @@ to C<$/[0]>, C<$1> is equivalent to C<$/[1]>, etc.
 
 =item $&
 
-C<$/> now contains the match object, so the Perl 5 behavior of C<$&> can
-be obtained by stringifying it, i. e. C<~$/>. C<$/.Str> also should
-work, but C<~$/> is the currently more common idiom.
+C<$/> now contains the L<match|/type/Match> object, so the Perl 5 behavior of C<$&> can
+be obtained by stringifying it, i. e. C<~$/>.
+
+Please note that while C<$/.Str> should also work,
+C<~$/> is currently the more common idiom.
 
 =item ${^MATCH}