Re: [PATCH] Support diff.autorefreshindex=true in `git-diff --quiet'

Karl Chen [off-list ref] writes:

When diff.autorefreshindex is true, if a file has merely been 'touched'
(mtime changed, but contents unchanged), then `git-diff --quiet' will
now return 0 (indicating no change) instead of 1, and also silently
refresh the index.

My knee-jerk reaction is that I do not particularly like this, but I
haven't thought things through.  What does --exit-code do with or without
the configuration variable?