Show cask description as None if not present

Library/Homebrew/cask/cmd/info.rb

@@ -36,8 +36,7 @@ module Cask
         repo = repo_info(cask)
         output << repo + "\n" if repo
         output << name_info(cask)
-        description = desc_info(cask)
+        output << desc_info(cask)
-        output << description if description
         language = language_info(cask)
         output << language if language
         output << artifact_info(cask) + "\n"
@@ -85,11 +84,9 @@ module Cask
       end
 
       def self.desc_info(cask)
-        return if cask.desc.nil?
-
         <<~EOS
           #{ohai_title("Description")}
-          #{cask.desc}
+          #{cask.desc.nil? ? Formatter.error("None") : cask.desc}
         EOS
       end
 

Library/Homebrew/test/cask/cmd/info_spec.rb

@@ -35,6 +35,8 @@ describe Cask::Cmd::Info, :cask do
       From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/with-auto-updates.rb
       ==> Name
       AutoUpdates
+      ==> Description
+      None
       ==> Artifacts
       AutoUpdates.app (App)
     EOS
@@ -49,6 +51,8 @@ describe Cask::Cmd::Info, :cask do
         From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/local-caffeine.rb
         ==> Name
         None
+        ==> Description
+        None
         ==> Artifacts
         Caffeine.app (App)
 
@@ -82,6 +86,8 @@ describe Cask::Cmd::Info, :cask do
       From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/with-caveats.rb
       ==> Name
       None
+      ==> Description
+      None
       ==> Artifacts
       Caffeine.app (App)
       ==> Caveats
@@ -107,6 +113,8 @@ describe Cask::Cmd::Info, :cask do
       From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/with-conditional-caveats.rb
       ==> Name
       None
+      ==> Description
+      None
       ==> Artifacts
       Caffeine.app (App)
     EOS
@@ -122,6 +130,8 @@ describe Cask::Cmd::Info, :cask do
       From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/with-languages.rb
       ==> Name
       None
+      ==> Description
+      None
       ==> Languages
       zh, en-US
       ==> Artifacts
@@ -139,6 +149,8 @@ describe Cask::Cmd::Info, :cask do
       From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/without-languages.rb
       ==> Name
       None
+      ==> Description
+      None
       ==> Artifacts
       Caffeine.app (App)
     EOS
@@ -167,6 +179,8 @@ describe Cask::Cmd::Info, :cask do
       ==> Names
       Docker Community Edition
       Docker CE
+      ==> Description
+      None
       ==> Artifacts
       Docker.app (App)
       ==> Analytics
@@ -178,6 +192,8 @@ describe Cask::Cmd::Info, :cask do
       ==> Names
       Docker Community Edition
       Docker CE
+      ==> Description
+      None
       ==> Artifacts
       Docker.app (App)
       ==> Analytics