Problem: MS-Windows: "%T" time format does not appear to work.
Solution: Use "%H:%M:%S" instead.
5fbbec180b
Co-authored-by: Bram Moolenaar <Bram@vim.org>
Problem: A failing flaky test doesn't mention the time.
Solution: Add the time for debugging. Improve error message.
06d32a0c17
Co-authored-by: Bram Moolenaar <Bram@vim.org>