message: Clarify expected behavior in iterator-test
diff: @@ -71,8 +71,10 @@ make('close db with open iterator', function (db, t, done) {
  ite.next(function loop (err, key, value) {
  if (cnt++ === 0) {
  + // The first call should succeed, because it was scheduled before close()
  t.ifError(err, 'no error from next()')
  } else {
  + // The second call should fail, because it was scheduled after close()
  t.equal(err.message, 'iterator has ended')
  hadError = true
  }
  