Trivial documentation updates. [skip ci]

doc/whatsnew_1_2.rst

@@ -83,11 +83,11 @@ Library Updates
 ===============
 
 The two C libraries that are bundled with gevent have been updated.
-libev has been updated from 4.20 to 4.22 (`libev release notes`_) and
+libev has been updated from 4.20 to 4.23 (`libev release notes`_) and
 c-ares has been updated from 1.10.0 to 1.12.0 (`c-ares release notes`_).
 
 
-.. _libev release notes: https://github.com/gevent/gevent/blob/master/deps/libev/Changes#L17
+.. _libev release notes: https://github.com/gevent/gevent/blob/master/deps/libev/Changes
 .. _c-ares release notes: https://c-ares.haxx.se/changelog.html
 
 Compatibility

src/gevent/subprocess.py

@@ -15,10 +15,11 @@ Cooperative ``subprocess`` module.
    the standard library :mod:`subprocess` module (with many backwards
    compatible extensions from Python 3 backported to Python 2). There
    are some small differences between the Python 2 and Python 3
-   versions of that module and between the POSIX and Windows versions.
-   The HTML documentation here can only describe one version; for
-   definitive documentation, see the standard library or the source
-   code.
+   versions of that module (the Python 2 ``TimeoutExpired`` exception,
+   notably, extends ``Timeout`` and there is no ``SubprocessError``) and between the
+   POSIX and Windows versions. The HTML documentation here can only
+   describe one version; for definitive documentation, see the
+   standard library or the source code.
 
 .. _is not defined: http://www.linuxprogrammingblog.com/all-about-linux-signals?page=11
 """
@@ -396,7 +397,7 @@ class Popen(object):
           ``restore_signals``, ``encoding`` and ``errors``
 
         .. versionchanged:: 1.2b1
-           Add the ``encoding`` and ``errors`` parameters.
+           Add the ``encoding`` and ``errors`` parameters for Python 3.
         """
 
         if not PY3 and kwargs: