pathname: atomic_write shouldn't make dir sticky unless world writable

Library/Homebrew/extend/pathname.rb

@@ -165,14 +165,15 @@ class Pathname
     # The enclosing `mktmpdir` and the `chmod` are a workaround
     # for https://github.com/rails/rails/pull/34037.
     Dir.mktmpdir(".d", dirname) do |tmpdir|
+      should_fix_sticky_bit = dirname.world_writable? && !dirname.sticky?
+      FileUtils.chmod "+t", dirname if should_fix_sticky_bit
       begin
-        FileUtils.chmod "+t", dirname
-      rescue Errno::EPERM
-        :ignore
-      end
         File.atomic_write(self, tmpdir) do |file|
           file.write(content)
         end
+      ensure
+        FileUtils.chmod "-t", dirname if should_fix_sticky_bit
+      end
     end
   end