patch 9.0.0379: cleaning up after writefile() is a hassle Commit: https://github.com/vim/vim/commit/806a273f3c84ecd475913d901890bb1929be9a0a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 4 15:40:36 2022 +0100 patch 9.0.0379: cleaning up after writefile() is a hassle Problem: Cleaning up after writefile() is a hassle. Solution: Add the 'D' flag to defer deleting the written file. Very useful in tests.