Fix typos in comments
Fix typos in comments

Closes #2002

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