Add parens back

cmd/minikube/cmd/start.go

@@ -1001,7 +1001,7 @@ func validateNetwork(h *host.Host, r command.Runner) string {
 			out.T(out.Option, "{{.key}}={{.value}}", out.V{"key": k, "value": v})
 			ipExcluded := proxy.IsIPExcluded(ip) // Skip warning if minikube ip is already in NO_PROXY
 			k = strings.ToUpper(k)               // for http_proxy & https_proxy
-			if k == "HTTP_PROXY" || k == "HTTPS_PROXY" && !ipExcluded && !warnedOnce {
+			if k == ("HTTP_PROXY" || k == "HTTPS_PROXY") && !ipExcluded && !warnedOnce {
 				out.WarningT("You appear to be using a proxy, but your NO_PROXY environment does not include the minikube IP ({{.ip_address}}). Please see {{.documentation_url}} for more details", out.V{"ip_address": ip, "documentation_url": "https://minikube.sigs.k8s.io/docs/reference/networking/proxy/"})
 				warnedOnce = true
 			}