Fix issues with tests on macOS with Gawk 5.2.0 (#159)
Fix issues with tests on macOS with Gawk 5.2.0 (#159)

Division on Gawk 5.2.0 on macOS seems to be broken:

$ gawk --version
GNU Awk 5.2.0, API 3.2, PMA Avon 7, (GNU MPFR 4.1.0-p13, GNU MP 6.2.1)
...
$ gawk 'BEGIN { print "2"/"3" }'
gawk: cmd. line:1: error: division by zero attempted

It's likely this is the PMA issue, fixed here in Gawk's master branch:
https://git.savannah.gnu.org/cgit/gawk.git/commit/?id=53d97efad03453b0fff5a941170db6b7abdb2083

Also, update a couple of syntax error messages that have changed in
Gawk 5.2.0.
benhoyt/goawk,benhoyt/goawk,benhoyt/goawk