my $ref = $hls->do_hl(\$str, 'foo.perl');
is(ref($ref), 'SCALAR', 'got a scalar reference back');
like($$ref, qr/I can see you!/, 'we can see ourselves in output');
+ like($$ref, qr/&&/, 'escaped');
use PublicInbox::Spawn qw(which);
if (eval { require IPC::Run } && which('w3m')) {