Fix code style.

Signed-off-by: oooxff <oooxff@gmail.com>
Fix world to World.

Signed-off-by: oooxff <oooxff@gmail.com>
Fix hello, world to how are you ?

Signed-off-by: oooxff <oooxff@gmail.com>
Merge branch 'isse53'

Conflicts:
	main.c

Signed-off-by: oooxff <oooxff@gmail.com>
Fix merge error.

Signed-off-by: oooxff <oooxff@gmail.com>