Consider ignoring several rules for box.h

[grafin]

In box.h there is a series of function declarations without comment and with return type on the same line (Example). Those box_set_* functions are named so they don't really need a comment. And changing return type formatting in the middle of the list would make it look worst. Adding new functions to the end of the list with different formatting is not a good solution IMO because the list is kinda sorted and similar function should be near each other.