This actually *worked* in my tests which confuses me.
It really shouldn't, `apropos -foo` will complain about "-o" not being
a valid option.
It should be `apropos -- -foo`.
Now, of course there are awful apropos implementations, so let's see
if someone complains
In the new __fish_apropos, makewhatis is run explicitly to generate the
whatis database. However this can be a little slow. Run it in the
background, after the apropos call completes so as to avoid a weird
race.
This means that descriptions may not be available the first time the
user invokes it, but that's better than appearing to hang for a while.
override MANPATH used by apropos with local whatis database and update it once a day
get rid of xargs
Created __fish_apropos and fixed __fish_complete_man to use that as well
moved macos apropos comment
