I've no idea what you are referring to. The patch removed in https://github.com/Homebrew/homebrew-dupes/commit/44fc867849f309ff526 was to fix hard-coded path to libtool, and it doesn't apply anymore as upstream correctly detect libtool on Darwin already.

All being said, the patch you provided is correct. It is just the comment doesn't describe the actual problem precisely and may confuse other people when evaluating whether the same patch is needed for newer versions.

Please adjust the comment and squash into a single commit.