[I18n-sig] Format strings

[Josef Spillner]

Hi,

as pointed out by Adeodato Simó, there exists a discrepancy between the 
intuitive and the (C-legacy-based?) actual handling of format strings with 
unicode arguments:

http://chistera.yi.org/~adeodato/blog/misc/44_utf8_printf.html

This does indeed seem to be problematic, and I cannot see any legitimate 
reason for this. Can this be fixed for the upcoming version please?

Josef