ref: 1c424b1b4d5931f2a4b87b6f0f75827bc53ff9d7 dir: /testdir/t.do/
NF > 0 { t = $0 gsub(/[ \t]+/, "", t) n = split($0, y) if (n > 0) { i = 1 s = "" do { s = s $i } while (i++ < NF) } if (s != t) print "bad at", NR }