Grammar Failure

use v6;
grammar Markov {
    token TOP {
        [<comment>|<command>]+
    }
    token comment {
        ^^ '#' \N* \n
    }
    token command {
        ^^ $<item>=[\S+] <ws> '->' <ws> $<stop>=['.'?] $<replacement>=[\N+] \n
    }
}

my $test = Q {# This rules file is extracted from Wikipedia:
# http://en.wikipedia.org/wiki/Markov_Algorithm
A -> apple
B -> bag
S -> shop
T -> the
the shop -> my brother
a never used -> .terminating rule
};

my $match = Markov.parse($test);
say $match.perl;