minor grammar fix
minor grammar fix

rxcomm/mixminion,Javex/mixminion,nmathewson/mixminion,Javex/mixminion,rxcomm/mixminion,Javex/mixminion,nmathewson/mixminion,rxcomm/mixminion,crooks/mixminion,reezer/mixminion,nmathewson/mixminion,crooks/mixminion,crooks/mixminion,reezer/mixminion,mixminion/mixminion,Javex/mixminion,reezer/mixminion,mixminion/mixminion,crooks/mixminion,mixminion/mixminion,reezer/mixminion,rxcomm/mixminion,nmathewson/mixminion,mixminion/mixminion