ref: 96c2be96e4beaac08d89af4dea8069d9ca1c4b09 dir: /test/t.split9/
{ n = split ($0, x, FS) if (n != NF) print "botch at ", NR, n, NF for (i=1; i<=n; i++) if ($i != x[i]) print "diff at ", i, x[i], $i }