It is astounding that after all this time no one noticed that
incrementing EDITLEVEL wasn't doing the job it's intended to do.
Diagnosed by entrez: since VERSION_COMPATIBILITY was defined as
3.7.0-0 and up, increasing the fourth component wasn't resulting in
old 3.7.0-x files being rejected.
This increments EDITLEVEL yet again, because my testing after
commenting out VERSION_COMPATIBILITY still wasn't rejecting older
files. Proably because the oldest I had available already had the
verison info with the preceding EDITLEVEL so weren't actually out
of date yet.
Once I had old files be rejected, I discovered that the rejection
message was invisible (for tty on OSX). The message line showed
spaces, matching the length of the intended message, followed by
--More--. This fixes that too.
0efa1d60b7