[src/core/Match.pm] changed <> to q[] in .gist

Suggested by pmichaud++. It may or may not be worth it to also
escape all ']' in the matched text itself.

src/core/Match.pm

@@ -62,7 +62,7 @@ my class Match is Capture is Cool {
     multi method gist (Match:D: $d = 0) {
         return "#<failed match>" unless self;
         my $s = ' ' x ($d + 1);
-        my $r = "=> <{self}>\n";
+        my $r = "=> q[{self}]\n";
         for @.caps {
             $r ~= $s ~ (.key // '?') ~ ' ' ~ .value.gist($d + 1)
         }