Fix stdio.h puts(), should add a trailing newline per C specs (!)

[tkchia]

No description provided.

[maximecb]

Thanks for the fix :)

[tkchia]

Thanks @maximecb ! Though I just discovered that many of the example programs seem to assume that puts() does not add a newline. I am not quite sure about the best way to fix them.

Thank you!

[maximecb]

I looked at that. In the chess program, all the puts are for debugging and commented so it doesn't matter. Looks like the situation is similar in basic.c, so I think no need to change anything there.