bug#11858: df -m undocumented, why no df -g

[Jim Meyering]

Bernhard Voelker wrote:
> On 07/05/2012 02:35 PM, Jim Meyering wrote:
>> However, I'm tempted to remove it directly this time, since it's been
>> undocumented for a while:
>>
>>   5 years in df.1 and df --help: COREUTILS-6_9-151-g1e07a21
>>   11 years in coreutils.texi: FILEUTILS-4_1_4-28-gf5bf6fe
>>
>> What do you think?
>
> I agree, the option has been added to df in 1996, and declared
> obsolescent in 2001, so the period since the latter is twice as
> long as the active use.
>
> And it's very easy to s/--megabytes/-BM/ ...

More important than 2001 is the year in which we removed
the reference from the man page and from --help: 2007