Updated Formatter.formatTime docs to indicate configuration via class attributes.
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index eb2c718..62f04d8 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -453,6 +453,18 @@
record. Otherwise, the ISO8601 format is used. The resulting string is
returned.
+ .. versionchanged:: 3.3
+ Previously, the default ISO 8601 format was hard-coded as in this
+ example: ``2010-09-06 22:38:15,292`` where the part before the comma is
+ handled by a strptime format string (``'%Y-%m-%d %H:%M:%S'``), and the
+ part after the comma is a millisecond value. Because strptime does not
+ have a format placeholder for milliseconds, the millisecond value is
+ appended using another format string, ``'%s,%03d'`` – and both of these
+ format strings have been hardcoded into this method. With the change,
+ these strings are defined as class-level attributes which can be
+ overridden at the instance level when desired. The names of the
+ attributes are ``default_time_format`` (for the strptime format string)
+ and ``default_msec_format`` (for appending the millisecond value).
.. method:: formatException(exc_info)