VimL
Latest commit a08ca04 Aug 18, 2016 @Smattr Smattr committed with Support leading whitespace in rebase -i comments (#40)
When rebasing interactively, Git ignores leading whitespace in front of
the comment character. At time of writing (a42d7b6 of Git):

    git-rebase--interactive.sh:566:
    ...
    read -r command sha1 rest < "$todo"
    ...

At this point, IFS is unset and thus whitespace ignored. This commit
updates the interactive rebase syntax to correctly recognise this
scenario.