Display message when running brew cask _stanza without arguments.

Library/Homebrew/cask/lib/hbc/cli.rb

@@ -152,7 +152,7 @@ module Hbc
       Hbc.default_tap.install unless Hbc.default_tap.installed?
       Hbc.init if should_init?(command)
       run_command(command, *rest)
-    rescue CaskError, CaskSha256MismatchError => e
+    rescue CaskError, CaskSha256MismatchError, ArgumentError => e
       msg = e.message
       msg << e.backtrace.join("\n") if Hbc.debug
       onoe msg

Library/Homebrew/cask/lib/hbc/cli/internal_stanza.rb

@@ -44,13 +44,15 @@ module Hbc
         :stage_only,
         :nested_container,
         :uninstall,
-        :postflight,
-        :uninstall_postflight,
         :preflight,
+        :postflight,
+        :uninstall_preflight,
         :uninstall_postflight,
       ]
 
       def self.run(*args)
+        raise ArgumentError, "No stanza given." if args.empty?
+
         table = args.include? "--table"
         quiet = args.include? "--quiet"
         format = :to_yaml if args.include? "--yaml"