The ``processName`` format mapping key in logging formats works in versions 2.6.*, 2.7.* and 3.1.* onwards; in 2.5 and down and in 3.0.1, ``format`` fails when this key is present in the format.

But in 2.6.8 docs, this mapping key is not documented:

http://docs.python.org/release/2.6.8/library/logging.html
http://docs.python.org/release/3.0.1/library/logging.html

and in 2.7.3 and 3.1.5 and 3.2.3 docs, it is documented but there is no note that it is new in any particular version (unlike ``funcName``, for which there is “Changed in version 2.5: funcName was added”):

http://docs.python.org/release/2.7.3/library/logging.html
http://docs.python.org/release/3.1.5/library/logging.html
http://docs.python.org/release/3.2.3/library/logging.html

Consistent with (what I think are the) version note conventions, these seem like the actions to take:

- In 2.6 docs, add processName, and insert the note “Changed in version 2.6: processName was added”

- In 2.7 docs, insert that same note

- In docs for 3.1 and up, insert the note “Changed in version 3.1: processName was added”

We only update the docs for the active versions, so only 2.7, 3.2, and default (3.3) are going to get updated.

New changeset 204be25f24bd by Vinay Sajip in branch '2.7':
Issue #15399: Added versionchanged for processName.
http://hg.python.org/cpython/rev/204be25f24bd

New changeset 6b771075cfa3 by Vinay Sajip in branch '3.2':
Issue #15399: Added versionchanged for processName.
http://hg.python.org/cpython/rev/6b771075cfa3

New changeset 4b5e8f7d1ac4 by Vinay Sajip in branch 'default':
Closes #15399: merged documentation fix from 3.2.
http://hg.python.org/cpython/rev/4b5e8f7d1ac4