[merge] Mac- only allow unicode normalized filenames

[John Arbash Meinel]

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John Arbash Meinel wrote:
> I took some time today to work through some of the unicode normalization
> issues on Mac OS-X.
> As a quick summary, Mac doesn't preserve filenames if they use non-ascii
> names, instead choosing to always normalize them. Unfortunately, they
> chose a bad normalization.
> This patch modifies WorkingTree.list_files() and .extras() so that after
> listing a directory, if a file isn't found, it then attempts to
> normalize the filename, and try again.
> It also modifies Inventory.make_entry() so that we won't create
> non-normalized inventory entries.
> 

I haven't heard any comments on this patch. Martin approved the later
one (implicitly approving this one).

Just wondering if anyone wants to give me a -0 on something before I
merge it. I'll wait a couple more days if I don't hear anything.

John
=:->
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