message: fix typos post-luke-review
diff: @@ -41,7 +41,7 @@ const COMMANDS = [
  },
  {
  command: '/op',
  - args: '<userId> [<power-level>]',
  + args: '<user-id> [<power-level>]',
  description: 'Define the power level of a user',
  },
  {
  @@ -91,7 +91,7 @@ const COMMANDS = [
  },
  {
  command: '/verify',
  - args: '<userId> <deviceId> <deviceSigningKey>',
  + args: '<user-id> <device-id> <device-signing-key>',
  description: 'Verifies a user, device, and pubkey tuple',
  },
  // Omitting `/markdown` as it only seems to apply to OldComposer
  