changed the routeVariables text content. (#708)

Before changing the context there is a blind spot, and for this reason,
decided to add a line break.

Co-authored-by: Corey Daley <cdaley@redhat.com>

README.md

@@ -749,7 +749,8 @@ func TestMetricsHandler(t *testing.T) {
 
         rr := httptest.NewRecorder()
 	
-	// Need to create a router that we can pass the request through so that the vars will be added to the context
+	// To add the vars to the context, 
+	// we need to create a router through which we can pass the request.
 	router := mux.NewRouter()
         router.HandleFunc("/metrics/{type}", MetricsHandler)
         router.ServeHTTP(rr, req)