patch 8.1.1769: 'shellslash' is also used for completion commit https://github.com/vim/vim/commit/ac3150d385e6e3f3fe76642aac3cda954d30583f Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jul 28 16:36:39 2019 +0200 patch 8.1.1769: 'shellslash' is also used for completion Problem: 'shellslash' is also used for completion. Solution: Add the 'completeslash' option. (Yasuhiro Matsumoto, closes https://github.com/vim/vim/issues/3612)

" vimrc for test_gui_init.vim

" Note that this flag must be added in the .vimrc file, before switching on
" syntax or filetype recognition (when the |gvimrc| file is sourced the system
" menu has already been loaded; the ":syntax on" and ":filetype on" commands
" load the menu too).
set guioptions+=M