bufio: Missed last line when read file by bufio.NewScanner(f).Scan()

[AJIOB]

What version of Go are you using (go version)?

go version go1.8.3 windows/amd64

What operating system and processor architecture are you using (go env)?

Windows 10 Pro x64 version 1703 (OS build 15063.483)

What did you do?

Code: https://play.golang.org/p/PlxIOWk271
It is a simple example dup3 from Kernighan Go book. I'm passing arguments one.txt and two.txt (files from archieve One version.zip) and gets such output:
2 Hello
Run command: go run main.go one.txt two.txt

But when I'm addnig simple '\n' escape sequence symbol (Version two.zip) in file one.txt, I'm getting such output:
2 Hello
2 me

Why didi I loose last line of file one.txt by reading by Scan() and Text() functions?

[mvdan]

This is very likely a bug in your program. If you're confident it isn't, please open an issue with a small program that reproduces the issue on play.golang.org.

Also note how the source code even notes how errors aren't checked.

For questions about Go, see https://golang.org/wiki/Questions.