Thomas Rast <> writes:

> The logic described in d020e27 (diff: Fix rename pretty-print when
> suffix and prefix overlap, 2013-02-23) is wrong: The proof in the
> comment is valid only if both strings are the same length.  *One* of
> old/new can reach a-1 (b-1, resp.) if 'a' is a suffix of 'b' (or vice
> versa).

Thanks.  I was also having hard time convincing myself why that -1
does not under-run yesterday.

Will queue.
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