ref: 1c424b1b4d5931f2a4b87b6f0f75827bc53ff9d7 dir: /testdir/t.re1/
/[a-cg-j1-3]/ { print $0 " matches /[a-cg-j1-3]/" } /[^aeiou]/ { print $0 " matches /[^aeiou]/" }