[BzrTools][Win32] graph-ancestry needs sax.utils

[Aaron Bentley]

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Paul Moore wrote:
> Ah. I wonder if I see the problem - the Windows binary installer for
> bzr is built using py2exe, which only packs up modules that are
> actually used by [bzr].

Seems like a bad idea-- other plugins may also use obscure corners of
the standard library.  Perhaps there's an override for py2exe?

> But given that escape() isn't used anywhere in the dotgraph.py code,
> why not remove the import in any case?

Sure, I'll do that.

Aaron
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