Merge pull request #10218 from andreastt/fix-tap-migration-advice

missing_formula: fix cask installation advice on tap migration

Library/Homebrew/missing_formula.rb

@@ -109,7 +109,7 @@ module Homebrew
           break if new_tap_name == CoreTap.instance.name
 
           install_cmd = if new_tap_name.start_with?("homebrew/cask")
-            "cask install"
+            "install --cask"
           else
             "install"
           end