redis-cli: fix latency result output
redis-cli: fix latency result output

(Cleaned up a little by @mattsta)

Closes #1774

HunanTV/redis,slfs007/mk-redis,splitice/redis,jxwr/redis,MSOpenTech/redis,ksarch-saas/redis,MSOpenTech/redis,xuzhezhaozhao/redis_reading,ramonsnir/redis,jxwr/redis,himoca/redis,splitice/redis,slfs007/mk-redis,darksideofthemoo/redis-histogram,MSOpenTech/redis,louisliangjun/redis,maodeyi/redis_lua,ramonsnir/redis,himoca/redis,spearhead-ea/redis,darksideofthemoo/redis-histogram,HunanTV/redis,ttuna/msot-redis,maodeyi/redis_lua,ksarch-saas/redis,ttuna/msot-redis,ttuna/msot-redis,maodeyi/redis_lua,HunanTV/redis,jxwr/redis,ttuna/msot-redis,louisliangjun/redis,ramonsnir/redis,xuzhezhaozhao/redis_reading,spearhead-ea/redis,louisliangjun/redis,xuzhezhaozhao/redis_reading,MSOpenTech/redis,ttuna/msot-redis,ksarch-saas/redis,darksideofthemoo/redis-histogram,xuzhezhaozhao/redis_reading,darksideofthemoo/redis-histogram,slfs007/mk-redis,MSOpenTech/redis,HunanTV/redis,splitice/redis,louisliangjun/redis,splitice/redis,himoca/redis,ksarch-saas/redis,spearhead-ea/redis