bug#66502: 30.0.50; [PATCH; DOC] time-to-days and days-to-time use different epochs

[Richard Stallman]

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  > Oops; I didn't do that, because I thought doc patches didn't need a
  > ChangeLog message.  In hindsight, they need at least a commit message,
  > so that was pretty silly.

the commit message should list what entities you changed, added or
deleted: that is, the doc strings of which functions or variables etc.
And, in a general sense, what the change was about.

Please look at doc string change logs in some of the principal files.

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)