patch 8.1.1142: no test for dragging the window separators with the mouse commit https://github.com/vim/vim/commit/3fb01a53c685d8d7e7bd83c33500de80aed0d7c8 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 9 21:52:02 2019 +0200 patch 8.1.1142: no test for dragging the window separators with the mouse Problem: No test for dragging the window separators with the mouse. Solution: Add a test. (Dominique Pelle, closes https://github.com/vim/vim/issues/4226)