patch 8.2.2782: Vim9: blob operations not fully tested Commit: https://github.com/vim/vim/commit/39211cba723a2cb58a97c7e08826713164b86efc Author: Bram Moolenaar <Bram@vim.org> Date: Sun Apr 18 15:48:04 2021 +0200 patch 8.2.2782: Vim9: blob operations not fully tested Problem: Vim9: blob operations not fully tested. Solution: Make more blob tests run in Vim9 script. Fix filter(). Make insert() give an error for a null blob, like add().