+if ('experimental, only for help text') {
+ my $tmp = <<'EOF';
+:>
+```perl
+my $foo = 1 & 2;
+```
+:<
+EOF
+ $hls->do_hl_text(\$tmp);
+ my @hl = split(/^/m, $tmp);
+ is($hl[0], ":>\n", 'first line escaped');
+ is($hl[1], "```perl\n", '2nd line preserved');
+ like($hl[2], qr/<span\b/, 'code highlighted');
+ like($hl[2], qr/&/, 'ampersand escaped');
+ is($hl[3], "```\n", '4th line preserved');
+ is($hl[4], ":<\n", '5th line escaped');
+ is(scalar(@hl), 5, 'no extra line');
+
+}
+