bugfix: if rename_commands value is nil, .empty? will fail, [no method .empty? for NilClass]
bugfix: if rename_commands value is nil, .empty? will fail, [no method .empty? for NilClass]

mazeika/redisio,brianbianco/redisio,mazeika/redisio,brianbianco/redisio,mazeika/redisio,brianbianco/redisio