Remove space before Localize in source / add space in translations

[Dune-jr]

				str_format(aImprovement, sizeof(aImprovement), Localize(" (%s seconds faster)"), aTime);

(https://github.com/teeworlds/teeworlds/blob/0992498bbe95a1b47526f09c7df7a5e1b52b3056/src/game/client/components/infomessages.cpp#L107)