patch 8.0.0471: exit callback test sometimes fails commit https://github.com/vim/vim/commit/0529b3eb01fcfd18c0644f8ece9ea107dd460a0f Author: Bram Moolenaar <Bram@vim.org> Date: Thu Mar 16 22:30:37 2017 +0100 patch 8.0.0471: exit callback test sometimes fails Problem: Exit callback test sometimes fails. Solution: Add it to the list of flaky tests.

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