Update autoconf version (#539)

jcea · web-flow · commit dca77b49553b · 2019-09-28T02:00:12.000+02:00
diff --git a/setup.rst b/setup.rst
@@ -450,7 +450,7 @@ example, ``autoconf`` by itself will not regenerate ``pyconfig.h.in``.
 appropriate.
 
 Python's ``configure.ac`` script typically requires a specific version of
-Autoconf.  At the moment, this reads: ``AC_PREREQ(2.65)``.
+Autoconf.  At the moment, this reads: ``AC_PREREQ(2.69)``.
 
 If the system copy of Autoconf does not match this version, you will need to
 install your own copy of Autoconf.
