[PATCH] More robust external diff output handling

[Dmitry Vasiliev]

Hi,

On Mandrake 10.1 with non-C locale settings external diff ignores LANG=C 
environment variable. I guess such behavior is because of all LC_* variables 
are also set and so LANG value is overridden. The attached patch fixed it by 
setting also LC_ALL=C variable so the diff output now should be handled more 
robustly within non-C environment.

-- 
Dmitry Vasiliev (dima at hlabs.spb.ru)
     http://hlabs.spb.ru
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