patch 8.2.0470: Test_confirm_cmd_cancel() can fail on a slow system Commit: https://github.com/vim/vim/commit/7b1b36b1cb744e87adfbef88b7ce26c863b0594a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 28 21:48:55 2020 +0100 patch 8.2.0470: Test_confirm_cmd_cancel() can fail on a slow system Problem: Test_confirm_cmd_cancel() can fail on a slow system. Solution: Use WaitForAssert(). (Ozaki Kiichi, closes https://github.com/vim/vim/issues/5861)

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