Plan 9 from Bell Labs’s /usr/web/sources/contrib/gabidiaz/root/sys/src/cmd/perl/t/op/regexp_noamp.t
#!./perl $skip_amp = 1; for $file ('./op/regexp.t', './t/op/regexp.t', ':op:regexp.t') { if (-r $file) { do $file; exit; } } die "Cannot find ./op/regexp.t or ./t/op/regexp.t\n";