[1.1.X] Fixed #12230 - Updated utils.translation.to_locale to support the...

        if to_lower:

            return language[:p].lower()+'_'+language[p+1:].lower()

        else:

            # Get correct locale for sr-latn

            if len(language[p+1:]) > 2:

                return language[:p].lower()+'_'+language[p+1].upper()+language[p+2:].lower()

            return language[:p].lower()+'_'+language[p+1:].upper()

    else:

        return language.lower()

regressions = ur"""

Format string interpolation should work with *_lazy objects.

>>> from django.utils.translation import ugettext, ugettext_lazy, activate, deactivate, gettext_lazy

>>> from django.utils.translation import ugettext, ugettext_lazy, activate, deactivate, gettext_lazy, to_locale

>>> s = ugettext_lazy('Add %(name)s')

>>> d = {'name': 'Ringo'}

>>> s % d

u'Dodaj Ringo'

>>> deactivate()

Tests the to_locale function and the special case of Serbian Latin (refs #12230 and r11299)

>>> to_locale('en-us')

'en_US'

>>> to_locale('sr-lat')

'sr_Lat'

Test the to_language function

>>> from django.utils.translation.trans_real import to_language

>>> to_language('en_US')

'en-us'

>>> to_language('sr_Lat')

'sr-lat'

It should be possible to compare *_lazy objects.

>>> s1 = ugettext_lazy('Add %(name)s')