How do you exit vimdiff mode in vim, specifically, for Fugitive?

Question

I am using vim with the fugitive extension. It has a :Gdiff command which brings you into vimdiff mode, but what is the right/quick way to close/quit vimdiff mode?

I.e.,

Answer 1

Check the vimdiff toggling between diffthis and diffoff here at this page.

The code:

nnoremap  df :call DiffToggle()

function! DiffToggle()
    if &diff
        diffoff
    else
        diffthis
    endif
:endfunction