use Perl

I've been fighting like mad on the TAP development list to keep future versions of TAP backwards-compatible. Though there's a bit of sympathy for my position, it appears that I'm being unanimously overruled. This has a strong potential for being the next version of TAP, along with a nested TAP document:

TAP version 13
ok 1 - foo
  begin 2 - nested
  1..2
  ok 1 - bar
  ok 2 - fribble
  end 2 - nested
ok 3 - fook

That is almost backwards compatible because older TAP parsers would ignore anything they don't recognize and thus see this:

TAP version 13
ok 1 - foo
ok 3 - fook

Since that jumps from ok 1 to ok 3, it's not valid TAP and your current Test::Harness will report it as a parse error. Thus, all tests pass, but you get a failure report. To make it valid TAP, you need to parse the nested section and embed a summary line:

TAP version 13
ok 1 - foo
  begin 2 - nested
  1..2
  ok 1 - bar
  ok 2 - fribble
  end 2 - nested
ok 2 - nested
ok 3 - fook

However, the objections to this were strong and many. If we move forward this, the next version of TAP will not be properly parseable unless you upgrade your test harness. Hopefully this will not occur too often.