- removed extra white spaces in Makefile
- changed license from GPL-3.0 to GPL-3.0-only
- added test.sh

Signed-off-by: Clark Wang <dearvoid@gmail.com>
(cherry picked from commit 17d4d05fd5)

Sexpect is another implementation of Expect which is specifically
designed for shells. It's lightweight and has no dependency on other
packages.

Signed-off-by: Clark Wang <dearvoid@gmail.com>
(cherry picked from commit 49b1e63444)