[issue762] git format diffs are confused by source file modification after copy

[Richard Lowe]

New submission from Richard Lowe <richlowe at richlowe.net>:

git format diffs mis-represent changes where a file was copied, and then the
source file changed.

For instance:
% hg cp a b
% hg ci -m "Copy"
% echo "foo" > a
% hg ci -m "Two"

A git format diff will show the copy a to b, but not realize that b should have
the content of the *old* a.

A script to reproduce this is attached.

----------
files: repro.sh
messages: 4069
nosy: richlowe
priority: urgent
status: unread
title: git format diffs are confused by source file modification after copy

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Mercurial issue tracker <mercurial-bugs at selenic.com>
<http://www.selenic.com/mercurial/bts/issue762>
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