patch 9.0.1201: assignment with operator doesn't work in object method Commit: https://github.com/vim/vim/commit/4cae845ce32797bcae845aacf740ed865b479f34 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 15 15:51:48 2023 +0000 patch 9.0.1201: assignment with operator doesn't work in object method Problem: Assignment with operator doesn't work in object method. Solution: Handle loading the object member. (closes https://github.com/vim/vim/issues/11820) Add a few more tests.