Unexpand --all of <7 printables, 2-8 spaces, tab, word> loses a tab. perl -lwe 'print 1234567, " " x $_, "\t$_" for (1..9)' | unexpand --all --> 1234567 1 1234567 2 1234567 3 1234567 4 1234567 5 1234567 6 1234567 7 1234567 8 1234567 9
Coreutils-8.12. Old bug, has existed at least since version 6.8. -- Hallvard
