$ src/bitcoin-cli help getblock
...
Result (for verbosity = 2):
{             (json object)
  ...,        Same output as verbosity = 1
  "tx" : [    (json array)
    {         (json object)
      ...     The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 "tx" result
    },
    ...
  ],
  ...         Same output as verbosity = 1
}

$ src/bitcoin-cli help getblock
...
Result (for verbosity = 2):
{             (json object)
  ...,        Same output as verbosity = 1
  "tx" : [    (json array)
    {         (json object)
      ...     The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 "tx" result
    },
    ...
  ]
}