small bug in to_char and TM prefix, in RC

Hello,

I tested TM formating with czech names. Upper case chars in name are not
correct. Function upper works perfectly.

Sample:

postgres=# select to_char(date '2006-02-03', 'TMday');
to_char
---------
ptek
(1 řdka)

correct

but

postgres=# select to_char(date '2006-02-03', 'TMDAY');
to_char
---------
PTEK
(1 řdka)

correct is PTEK

without spec. chars
wrong: PaTEK, have be: PATEK

Regards
Pavel Stehule

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