Re: [PATCH v6] diff.c: keep arrow(=>) on show_stats()'s shortened filename part to make rename visible.

Yoshioka Tsuneo [off-list ref] writes:

Before this commit, this output is shortened always by omitting left most
part like "...foo => barbarbar". So, if the destination filename is too long,
source filename putting left or arrow can be totally omitted like
"...barbarbar", without including any of "foofoofoo =>".

This is an explanation much easier to understand than the one in the
previous iteration.  Thanks.