Diverse markup fixes.
diff --git a/Doc/library/warnings.rst b/Doc/library/warnings.rst
index 6188195..d031b15 100644
--- a/Doc/library/warnings.rst
+++ b/Doc/library/warnings.rst
@@ -203,7 +203,7 @@
.. function:: warnpy3k(message[, category[, stacklevel]])
Issue a warning related to Python 3.x deprecation. Warnings are only shown
- when Python is started with the -3 option. Like func:`warn` *message* must
+ when Python is started with the -3 option. Like :func:`warn` *message* must
be a string and *category* a subclass of :exc:`Warning`. :func:`warnpy3k`
is using :exc:`DeprecationWarning` as default warning class.