[bug#72536] [PATCH v3] tap: new `--stderr-prefix' option to prefix test script's stderr

Hi Richard,

    Supposedly I have not appeared in copyright.list for Automake yet.

Ah, now I find you listed there. Yay! No need to do anything more on the
copyright front.

    Attached is v3 of the patch series.  Changes from v2:

Thanks much. Will review asap. --best, karl.