bug#10915: 8.13: df -- overly long output lines are very hard to read

[Jim Meyering]

Jim Meyering wrote:
...
> Regarding --exclude, its name is problematic since there's already an
> --exclude-type option.  Adding a new --exclude option would render invalid
> any existing use of the perfectly valid abbreviation, --exclude=$FS_TYPE
>
> And then some would probably want an --include option to go along with it.
> This makes me wonder about different semantics, say --filter=[-+]REGEXP
> where --filter=-EXCLUDE_RE and --filter=+INCLUDE_RE.
> Or maybe even encode more.  What if you want to filter
> based on the "Mounted-on" name and I want to filter
> based on the "Filesystem" column?

Besides, once the columns are reordered, you can filter
just fine using grep.