Fixed SayFilter not returning all text.

[CookStar]

command.arg_string does not return all text, so fix it to command.command_string.

from commands import CommandReturn
from commands.say import SayFilter

@SayFilter
def on_say(command, index, team_only):
    #say this is my text
    print(command.command_string)#this is my text
    print(command.arg_string)#is my text
    return CommandReturn.CONTINUE

[Ayuto]

Good catch, thanks! :)