This small mod allows you to use some commands just like in 1.12 and adds shorter versions of /gamemode.
/gamemode <mode> [player] :
Added arguments 0, 1, 2, 3, c, s, a and sp for quicker gamemode switching.
/gm <mode> [player]
Shorter version of /gamemode
/gms, /gmc, /gma, /gmsp [player]
Why needing to type a space between /gm and the mode?
Added arguments 0, 1, 2, 3, c, s, a and sp to quickly change the server´s default gamemode.
Same as /defaultgamemode
Also added 0,1,2,3 here just like in 1.12 or earlier
Note: It can´t be placed into an development environment´s run folder! It will crash the game if you do that.
To disable update checking disable it in forge´s config.