Change help text for `wd ls` and `wd rm`
Change help text for `wd ls` and `wd rm`

You cannot write `wd list` but you can however write `wd ls`. The help
text doesn't really makes this clear but rather references `wd --list`
and `wd --remove` instead of `wd ls` and `wd rm`.

mfaerevaag/wd,hiberabyss/wd