The fg function shades the bring-to-foreground command fg on Mac

[holyjak]

The function fg in functions/fg.fish should be renamed to e.g. fgr since (at least under OS X) it shades the command for bringing a stopped job to the foreground.

To replicate:

~$ cd ~/.config/fish
~/.c/fish$ less README.textile
^Z
~/.c/fish$ fg
find: -name: requires additional arguments