found errors in chapter 16, activity 16.02

[PetyaKatsarova]

it is not reading the last numbers from the files leading to wrong sum of even and odd numbers due to returned on reaching EOF.
second error: it was reading '\r', so had to trim it too. I did a quick ugly solution:
func source(filename string, out chan int, wg *sync.WaitGroup) {
f, err := os.Open(filename)
if err != nil { panic(err) }

rd := bufio.NewReader(f)
for {
	str, err := rd.ReadString('\n')
	if err != nil {
		if err.Error() == "EOF" {
			i, err := strconv.Atoi(str) // ugly code- repetition but the job is done
			fmt.Println(i)
			if err != nil { panic(err) }
			out <- i
			f.Close()
			wg.Done()
			return
		} else { panic(err) }
	}
	str     = strings.TrimRight(str, "\r\n")
	i, err := strconv.Atoi(str)
	fmt.Println(i)
	if err != nil { panic(err) }
	out <- i
}

}