[PATCH 4 of 8] encode all output in stdio encoding

[Alexis S. L. Carvalho]

Thus spake Andrey:
> I should better have written something like 'encode all output in stdio 
> encoding, if not already encoded' in commit message. :) That ui.ui.encode() 
> function leaves all non-Unicode strings untouched, so hg cat works as 
> expected.
> 

It prints a traceback with hg log --patch with a revision that changes
the encoding of a file.

Alexis