So I was messing around in creative with command blocks. I wanted to put myself in survival mode for a test.
So I typed in: "/ga"
And I pressed tab. Minecraft made this "/game".
Minor issue, so yeah. And if someone reported this, sorry I didn't find it while searching.
Duplicate of MC-41205
Works as intended. Tab only completes parts of the command which are non-ambiguous. So if you try:
and hit Tab, it will add a ".", not a ".useItem" or ".walkOneCm"
Press Tab again to get new results.