Pretty Much Perfect Macaroni Salad

I cooked 3-1/2 cups small shell macaroni for 8 minutes in boiling, salted water. Let it cool, then added all of this deliciousness:

• 1cup Hellmann's mayonnaise
• 2tablespoons vinegar
• 1tablespoon Hellmann's Dijonnaise mustard
• 1teaspoon sugar
• 1teaspoon salt
• 1⁄4teaspoon ground black pepper
• 1cup thinly sliced celery
• 1cup chopped green bell pepper
• 1⁄4cup chopped onion