bug#9939: Problems with the SIZE description in man pages for <ls> and <du>

[Jim Meyering]

Paul Eggert wrote:

> On 11/15/11 08:45, Voelker, Bernhard wrote:
>> -KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, 
>> Y.\n\
>> +KB (1000), K (1024), MB (1000KB), M (1024K), and so on for G, T, P, E, Z, 
>> Y.\n\
>
> That would be fine with me.  (I find them equally confusing. :-)

I'm 60/40 for the use of "*" (i.e., 1000*1000), because with it,
each comma-separated item is self-contained.

In your replacement, each of MB and M relies on the
just-defined "KB" or "K" notation.  Without that context,
they may be misinterpreted.