patch 8.0.0286: not always redrawing after screen resize commit https://github.com/vim/vim/commit/c10f0e7cb0f35eea489b038e56c87b818eee975b Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 1 18:37:14 2017 +0100 patch 8.0.0286: not always redrawing after screen resize Problem: When concealing is active and the screen is resized in the GUI it is not immediately redrawn. Solution: Use update_prepare() and update_finish() from update_single_line().