Fixed widths in top section of cache.go
Fixed widths in top section of cache.go

cognusion/go-cache-lru,robfig/go-cache,patrickmn/go-cache,ggaaooppeenngg/cachemap,zj8487/go-cache,pmylund/go-cache,dustin/go-cache,nothingmuch/go-cache,jiangjin/go-cache,yxd-hde/go-cache