Fix minor wording issue.
sys.maxunicode is not called and thus does not return anything; it *is*
something. (I checked the doc quickly to see if it tells that
expression return things but found nothing.)
I also removed markup that would just generate a useless link to the
enclosing section.
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 43f65e2..a64c221 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -629,7 +629,7 @@
i.e. ``1114111`` (``0x10FFFF`` in hexadecimal).
.. versionchanged:: 3.3
- Before :pep:`393`, :data:`sys.maxunicode` used to return either ``0xFFFF``
+ Before :pep:`393`, ``sys.maxunicode`` used to be either ``0xFFFF``
or ``0x10FFFF``, depending on the configuration option that specified
whether Unicode characters were stored as UCS-2 or UCS-4.