ref: b2ef0ff49de457a6e48751e7eedd8131cdca5f98
parent: 192c1fd73a54870f8736908886d7fe0905e5ec58
author: Humm <hummsmith42@gmail.com>
date: Wed Apr 21 04:28:32 EDT 2021
plumber: fix substrings in match rules Unmatched substrings are nil, so we can't rely on nil terminating the array of substrings.