Fix minor typo in `bash_functions`
Fix minor typo in `bash_functions`

Close alrra/dotfiles#15

christophermoura/dotfiles,oddlord/dotfiles,EDiLD/dotfiles,mickael83/ubuntu-dotfiles,wingy3181/dotfiles,newtonne/dotfiles,wingy3181/dotfiles,wingy3181/dotfiles,AlbertoElias/dotfiles,b-boogaard/dotfiles,girishramnani/dotfiles,christophermoura/dotfiles,pbrooks/dotfiles,girishramnani/dotfiles,mickael83/ubuntu-dotfiles,AlbertoElias/dotfiles,newtonne/dotfiles,zlot/dotfiles,zlot/dotfiles,makabde/dotfiles,EDiLD/dotfiles,makabde/dotfiles