few fixes

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
save

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
fix

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
reading one line and make an output success

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
impl advance

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
line splitting is working!

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>