Fixed #4389: be more robust in `get_language_bidi()`. Thanks, arien.
Fixed #4389: be more robust in `get_language_bidi()`. Thanks, arien.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%408596

Belgabor/django,Belgabor/django,Belgabor/django