Command help is usually incomplete

For example, you type "/help", you can see some incomplete usage of commands such as:

• advancement (grant|revoke)

• effect (clear|give)

  • should be "effect clear [<target>]  [<effect>]" and "effect give <target> <effect> <duration> <level> [true|false]"

• summon <entity> [<pos>]

  • should be "summon <entity> [<pos>] [<data>]

• time (add|set|query)

  • should be "time (add|set) <value>" and "time query (day|daytime|gametime)"