This should make seeing what the BFG has got up to a lot easier - the new output looks like this (and it only appears if files have been changed, or deleted, as appropriate).

Changed files
-------------

    Filename                             Before & After
    --------------------------------------------------------------------------------------------------
    CODE.conf                          | e3aa4a56 ⇒ b9241055, 6fd90c18 ⇒ 1f390cd7, ...
    PROD.conf                          | 5a89032a ⇒ 38193000, 2611394d ⇒ 9c742f65, ...

Deleted files
-------------

    Filename                     Git id
    ------------------------------------------------
    bg.jpg                     | d0ea4091 (2.0 MB)
    guardian_space002.png      | 24215b1e (1.2 MB)