Python: closest_int_same_weight.py end of line fix

[KennethKinLum]

[tsunghsienlee]

This seems a slight mistyping at our side that caused this error https://github.com/adnanaziz/EPIJudge/commit/a4e3466b72637cc24dce8fca4e5561942114933a.

[nonopolarity]

one coworker was saying everybody in the team should turn on "remove trailing space" in the code editor, or else the line seems to be changed by that person but in fact was not, and git blame or similar action would not work.