bug#21926: du --summarize prunes subdirectories from output.

[Michaël Cadilhac]

Hi there;

The --summarize option of du(1) states:
              display only a total for each argument
Thus I'm assuming that whatever the number of arguments, I'll obtain
an equal number of outputs.  However:

$ mkdir -p a/b
$ du -s a a/b
0       a
$

It is either a bug of du or of its man.

Thanks!
M.

Technical details: du (GNU coreutils) 8.24 on
Arch Linux 4.1.12-1-lts #1 SMP Tue Oct 27 17:21:25 CET 2015 x86_64 GNU/Linux