patch 8.2.0462: previewwindow test fails on some systems Commit: https://github.com/vim/vim/commit/37bb030cd9088ee66dc2d41c2d3602d1e5f4a7ef Author: Bram Moolenaar <Bram@vim.org> Date: Fri Mar 27 20:24:14 2020 +0100 patch 8.2.0462: previewwindow test fails on some systems Problem: Previewwindow test fails on some systems. (James McCoy) Solution: Wait a bit after sending the "o". (closes https://github.com/vim/vim/issues/5849)

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