[Konstantinos]

The limit is 144 for client messages. You used only 100, so you get 43 characters more (+ NULL).

pawn Код:

CMD:b(playerid, params[])
{
    if(isnull(params)) return SendClientMessage(playerid, COLOR_GREY, "[Usage]: /b [text]");
    new string[144];
    format(string, sizeof(string), "(( %s: %s ))", GetName(playerid), params);
    ProxDetector(20, playerid, string, COLOR_GREY, COLOR_GREY, COLOR_GREY, COLOR_GREY, COLOR_GREY);
    return 1;
}