bg451/step3.go

## step3.go
func homeHandler(w http.ResponseWriter, r *http.Request) {
  span := opentracing.StartSpan("/home") // Start a span using the global, in this case noop, tracer
  defer span.Finish()
  // ... the rest of the function
}
	func homeHandler(w http.ResponseWriter, r *http.Request) {
	span := opentracing.StartSpan("/home") // Start a span using the global, in this case noop, tracer
	defer span.Finish()
	// ... the rest of the function
	}