message: Document need_vin_vout_mismatch argument to make_spender
diff: @@ -444,6 +444,8 @@ def make_spender(comment, *, tap=None, witv0=False, script=None, pkh=None, p2sh=
  * standard: whether the (valid version of) spending is expected to be standard
  * err_msg: a string with an expected error message for failure (or None, if not cared about)
  * sigops_weight: the pre-taproot sigops weight consumed by a successful spend
  + * need_vin_vout_mismatch: whether this test requires being tested in a transaction input that has no corresponding
  + transaction output.
  """
  conf = dict()
  