Minor stylistic improvements to MR output in list.

cli/app/list.go

@@ -207,15 +207,15 @@ can take some time.
 			}
 			allStats[app.Server] = stats
 		}
-		if internal.MachineReadable {
+		if (internal.MachineReadable) {
 			jsonstring, err := json.Marshal(allStats)
-			if err != nil {
-				fmt.Println("Error marshalling data to JSON:")
-				fmt.Println(err)
+			if (err != nil) {
+				logrus.Fatal(err)
 			} else {
 				fmt.Println(string(jsonstring))
 			}
-		} else {
+			return nil
+		}
 		alreadySeen := make(map[string]bool)
 		for _, app := range apps {
 			if _, ok := alreadySeen[app.Server]; ok {
@@ -267,7 +267,7 @@ can take some time.
 		if len(allStats) > 1 {
 			fmt.Println(fmt.Sprintf("total servers: %v | total apps: %v ", totalServersCount, totalAppsCount))
 		}
-		}
+
 		return nil
 	},
 }