"Your game mode has been changed" shows in log when it hasn't.

When setting your gamemode to the one your currently in the console outputs "Your game mode has been changed" when your still in the same gamemode.

What I excepted:
The console shouldn't have said anything or gave an error "You are already in that gamemode" or for consistency "Your gamemode has been updated" since it's still technically updating.
What happened:
The console outputs "Your game mode has been changed".

To reproduce:
1. Enter '/gamemode creative' (or whichever gamemode you're in).
2. The console outputs "Your game mode has been changed" when it hasn't.