cmd/search.rb: add commented-out deprecation.

Library/Homebrew/cmd/search.rb

@@ -78,6 +78,7 @@ module Homebrew
 
         puts Formatter.columns(Cask::Cask.to_a.map(&:full_name).sort)
       else
+        # odeprecated "'brew search' with no arguments to output formulae", "'brew formulae'"
         puts Formatter.columns(Formula.full_names.sort)
       end