We don't need a Pathname just to stat the directory

Library/Homebrew/formula_cellar_checks.rb

@@ -150,7 +150,6 @@ module FormulaCellarChecks
   private
 
   def relative_glob(dir, pattern)
-    return [] unless Pathname.new(dir).directory?
+    File.directory?(dir) ? Dir.chdir(dir) { Dir[pattern] } : []
-    Dir.chdir(dir) { Dir[pattern] }
   end
 end