Updates Sample.pier

Signed-off-by: Damien Cassou <damien.cassou@gmail.com>
Fix comment

Signed-off-by: Damien Cassou <damien.cassou@gmail.com>
Pier don't like line breaks so much

Signed-off-by: Damien Cassou <damien.cassou@gmail.com>
Ignore more files

Signed-off-by: Damien Cassou <damien.cassou@gmail.com>