patch 8.2.1514: multibyte vertical separator is cleared when dragging popup Commit: https://github.com/vim/vim/commit/dc0cf1db3e8e0de349e4cc5b0a7ab6c8b7dc2ebb Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 23 15:09:36 2020 +0200 patch 8.2.1514: multibyte vertical separator is cleared when dragging popup Problem: Multibyte vertical separator is cleared when dragging a popup window using a multi-byte character for the border. Solution: Only clear the character before the window if it is double width. (closes #6766)