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Document incompatible changes in 'format-time-string'

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* etc/NEWS: Mention the incompatible change in the interpretation
of the 3rd argument to 'format-time-string'.  (Bug#21943)
This commit is contained in:
Eli Zaretskii 2016-04-02 16:23:05 +03:00
parent 7228eb805d
commit 104221731e
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etc/NEWS
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@ -1771,6 +1771,11 @@ rule. The affected functions are 'current-time-string',
function 'encode-time', which already accepted a simple time zone rule
argument, has been extended to accept all the new forms.
*** Incompatible change in the third argument of 'format-time-string'.
Previously, any non-nil argument was interpreted as a UTC time zone.
This is no longer true; packages that want UTC time zone should pass t
as the third argument.
*** Time-related functions now consistently accept numbers
(representing seconds since the epoch) and nil (representing the
current time) as well as the usual list-of-integer representation.