patch 8.2.0425: code for modeless selection not sufficiently tested Commit: https://github.com/vim/vim/commit/515545e11f523d14343b1e588dc0b9bd3d362bc2 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 22 14:08:59 2020 +0100 patch 8.2.0425: code for modeless selection not sufficiently tested Problem: Code for modeless selection not sufficiently tested. Solution: Add tests. Move mouse code functionality to a common script file. (Yegappan Lakshmanan, closes #5821)