On Sat, Jan 09, 2021 at 02:42:36PM -0800, David Aguilar wrote: > Replace "\r" with a substituted variable that contains "\r". > Replace "\?" with "\{0,1\}". Nice. I was (very slowly) converging on that as the culprit. Thanks for the elegant fix! I'm running the test suite on Windows and OSX (now that they're set up locally) with this included and I'll send a v10 once complete.