Merge pull request #13048 from hyuraku/repair_search_casks

repair cask's fuzzy_search in `search_casks`

Library/Homebrew/extend/os/mac/search.rb

@@ -34,7 +34,8 @@ module Homebrew
         results = cask_tokens.extend(Searchable)
                              .search(string_or_regex)
 
-        results |= DidYouMean::SpellChecker.new(dictionary: cask_tokens)
+        cask_names = Cask::Cask.all.map(&:full_name)
+        results += DidYouMean::SpellChecker.new(dictionary: cask_names)
                                            .correct(string_or_regex)
 
         results.sort.map do |name|
@@ -44,7 +45,7 @@ module Homebrew
           else
             cask.full_name
           end
-        end
+        end.uniq
       end
     end