[MERGE] bzrlib.osutils fixes

[Alexander Belchenko]

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Dmitry Vasiliev пишет:
> 
> The attached bundle contains small fixes/optimizations for bzrlib.osutils.

Can you explain this change, please?

> @@ -704,7 +711,8 @@
>          for dirdetail, dirblock in osutils._walkdirs_utf8('.'):
>              self.assertIsInstance(dirdetail[0], str)
>              if isinstance(dirdetail[1], unicode):
> -                dirdetail[1] = dirdetail[1].encode('utf8')
> +                dirdetail = (dirdetail[0], dirdetail[1].encode('utf8'))
> +                dirblock = [list(info) for info in dirblock]
>                  for info in dirblock:
>                      self.assertIsInstance(info[4], unicode)
>                      info[4] = info[4].encode('utf8')
> 

[µ]
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