From c31f959ec1955999d4be4446914eaab2e715058a Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Fri, 30 Dec 2016 16:46:27 +0100
Subject: [PATCH] Hide `update` from `brew cask help`.

---
 Library/Homebrew/compat/hbc/cli/update.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/compat/hbc/cli/update.rb b/Library/Homebrew/compat/hbc/cli/update.rb
index 80f9612280..7820997cbb 100644
--- a/Library/Homebrew/compat/hbc/cli/update.rb
+++ b/Library/Homebrew/compat/hbc/cli/update.rb
@@ -11,8 +11,12 @@ module Hbc
         exit result.exit_status
       end
 
+      def self.visible
+        false
+      end
+
       def self.help
-        Formatter.warning("deprecated: use `brew update` instead")
+        "a synonym for 'brew update'"
       end
     end
   end