patch 8.1.0494: functions do not check for a window ID in other tabs commit https://github.com/vim/vim/commit/babfcf54ae9bf9570eddf4958a553635cd589e21 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Oct 25 13:11:16 2018 +0200 patch 8.1.0494: functions do not check for a window ID in other tabs Problem: Functions do not check for a window ID in other tabs. Solution: Also find the window ID in other than the current tab.

" 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