tests: don't split an empty string
tests: don't split an empty string

Infernoman/crowncoin,Infernoman/crowncoin,syscoin/syscoin,domob1812/crowncoin,syscoin/syscoin,Crowndev/crowncoin,Crowndev/crowncoin,syscoin/syscoin,domob1812/crowncoin,Infernoman/crowncoin,syscoin/syscoin,Infernoman/crowncoin,Crowndev/crowncoin,syscoin/syscoin,Infernoman/crowncoin,syscoin/syscoin,domob1812/crowncoin,Crowndev/crowncoin,domob1812/crowncoin,domob1812/crowncoin,syscoin/syscoin,domob1812/crowncoin,Crowndev/crowncoin,syscoin/syscoin,Infernoman/crowncoin,Crowndev/crowncoin