quickfix: fixed fugitive pull/rebase command.

[jonleopard]

Invoking <leader>P caused the following error:

E5108: Error executing lua: ...jon/dotfiles/nvim/.config/nvim/after/plugin/fugitive.lua:26: Wro ng number of arguments
stack traceback:
        [C]: in function 'Git'
        ...jon/dotfiles/nvim/.config/nvim/after/plugin/fugitive.lua:26: in function <...jon/dot
files/nvim/.config/nvim/after/plugin/fugitive.lua:25>

Using a single string seems to have fixed the issue.

[leonardogavaudan]

Thank you!