Move request log printing into the log function

go/fake-http/fake-http.go

			resp = respondWithStub(responses, w, req)
		}
		userAgent := req.Header.Get("User-Agent")
		log.Printf("%s %s - %d (%s, %q)", req.Method, req.URL, resp.StatusCode, req.RemoteAddr, userAgent)
		requestLog.Log(req, resp)
	})
// Log logs the request/response pair.
func (l *Log) Log(req *http.Request, resp *http.Response) {
	userAgent := req.Header.Get("User-Agent")
	log.Printf("%s %s - %d (%s, %q)", req.Method, req.URL, resp.StatusCode, req.RemoteAddr, userAgent)
	e := LogEntry{
		request:      req,
		requestBody:  new(bytes.Buffer),