docs: words instead of <=

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
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Gregory P. Smith 2024-09-21 10:39:53 -07:00 committed by GitHub
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@ -320,7 +320,7 @@ An :class:`IMAP4` instance has the following methods:
The *dur* argument sets a maximum duration (in seconds) to keep idling,
after which iteration will stop. It defaults to ``None``, meaning no time
limit. Callers wishing to avoid inactivity timeouts on servers that impose
them should keep this <= 29 minutes.
them should keep this at most 29 minutes.
See the :ref:`warning below <windows-pipe-timeout-warning>` if using
:class:`IMAP4_stream` on Windows.