patch 8.1.1352: undofile() reports wrong name commit https://github.com/vim/vim/commit/e9ebc9a91cac357fd4888f4b71fdff7d97b41160 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 19 15:27:14 2019 +0200 patch 8.1.1352: undofile() reports wrong name Problem: Undofile() reports wrong name. (Francisco Giordano) Solution: Clean up the name before changing path separators. (closes https://github.com/vim/vim/issues/4392, closes #4394)