ref: 3ddd7b252f8d0dacee2a7556e5ffb0d54bcf4f58 dir: /testdir/t.re1/
/[a-cg-j1-3]/ { print $0 " matches /[a-cg-j1-3]/" } /[^aeiou]/ { print $0 " matches /[^aeiou]/" }