Use '[[:blank:]]' instead of ' ' to match spaces/tabs (argoproj#4361)

Makefile

@@ -435,11 +435,11 @@ endif
  ./hack/port-forward.sh
  # Check dex, minio, postgres and mysql are in hosts file
 ifeq ($(AUTH_MODE),sso)
- grep '127.0.0.1 *dex' /etc/hosts
+ grep '127.0.0.1[[:blank:]]*dex' /etc/hosts
 endif
- grep '127.0.0.1 *minio' /etc/hosts
- grep '127.0.0.1 *postgres' /etc/hosts
- grep '127.0.0.1 *mysql' /etc/hosts
+ grep '127.0.0.1[[:blank:]]*minio' /etc/hosts
+ grep '127.0.0.1[[:blank:]]*postgres' /etc/hosts
+ grep '127.0.0.1[[:blank:]]*mysql' /etc/hosts
 ifeq ($(RUN_MODE),local)
  env SECURE=$(SECURE) ALWAYS_OFFLOAD_NODE_STATUS=$(ALWAYS_OFFLOAD_NODE_STATUS) LOG_LEVEL=$(LOG_LEVEL) UPPERIO_DB_DEBUG=$(UPPERIO_DB_DEBUG) VERSION=$(VERSION) AUTH_MODE=$(AUTH_MODE) NAMESPACED=$(NAMESPACED) NAMESPACE=$(KUBE_NAMESPACE) $(GOPATH)/bin/goreman -set-ports=false -logtime=false start
 endif