Exit on bad args to reformat-index
Exit on bad args to reformat-index

Before this, it was running the command anyway

laurenrother/riak,elkingtonmcb/riak,yangchengjian/riak,basho/riak,xuejianhai/riak,amyvmiwei/riak,glickbot/riak,DavidAlphaFox/riak,authbox-lib/riak,biddyweb/riak,GabrielNicolasAvellaneda/riak