1 files changed, 5 insertions, 6 deletions
diff --git a/Library/Homebrew/extend/fileutils.rb b/Library/Homebrew/extend/fileutils.rb
index 3a2b32481..4f20d36a3 100644
--- a/Library/Homebrew/extend/fileutils.rb
+++ b/Library/Homebrew/extend/fileutils.rb
@@ -84,15 +84,14 @@ module FileUtils
   end
 
   # @private
-  alias_method :old_mkdir, :mkdir
+  alias old_mkdir mkdir
 
   # A version of mkdir that also changes to that folder in a block.
   def mkdir(name, &_block)
     mkdir_p(name)
-    if block_given?
-      chdir name do
-        yield
-      end
+    return unless block_given?
+    chdir name do
+      yield
     end
   end
   module_function :mkdir
@@ -122,7 +121,7 @@ module FileUtils
 
   if method_defined?(:ruby)
     # @private
-    alias_method :old_ruby, :ruby
+    alias old_ruby ruby
   end
 
   # Run the `ruby` Homebrew is using rather than whatever is in the `PATH`.