shithub: trueawk

ref: 07f04384230b0c4cb8c47da7b5a6aebdea992b1e
dir: /testdir/t.gsub4/

length($1) == 0 { next }

{gsub("[" $1 "]","(&)"); print}
{gsub("[" $1 "]","(\\&)"); print}