patch 8.1.0135: undo message delays screen update for CTRL-O u commit https://github.com/vim/vim/commit/e0429681aed5448d1c3b8399d152a2b1a05ea6d7 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jul 1 16:44:03 2018 +0200 patch 8.1.0135: undo message delays screen update for CTRL-O u Problem: Undo message delays screen update for CTRL-O u. Solution: Add smsg_attr_keep(). (closes https://github.com/vim/vim/issues/3125)

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