[Haskell-beginners] number formatting with locale

[Dmitry Simonchik]

Hi all haskell lovers

I'm trying to print out Double in russian locale (we use "," as decimal
separator insetad of "."). I'm trying to set locale with
System.Locale.SetLocale like

setLocale LC_ALL $ Just "ru_RU.UTF-8"

this returns Just "ru_RU.UTF-8", so it seems that function call succeeded,
but when I call

show 20.2

it just prints 20.2 and not desired 20,2

Can anyone please help?
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