patch 8.1.0421: MS-Windows: Ruby path is wrong for Ruby 1.9 and later commit https://github.com/vim/vim/commit/76c612a166a59be04d5a38dc8db3b76ee67a458b Author: Bram Moolenaar <Bram@vim.org> Date: Fri Sep 21 14:31:51 2018 +0200 patch 8.1.0421: MS-Windows: Ruby path is wrong for Ruby 1.9 and later Problem: MS-Windows: Ruby path is wrong for Ruby 1.9 and later. Solution: Let -I argument depend on Ruby version. (Ken Takata, closes https://github.com/vim/vim/issues/3461)