Added xrefs to each other.

Doc/library/getopt.rst

@@ -11,7 +11,12 @@ This module helps scripts to parse the command line arguments in ``sys.argv``.
 It supports the same conventions as the Unix :cfunc:`getopt` function (including
 the special meanings of arguments of the form '``-``' and '``--``').  Long
 options similar to those supported by GNU software may be used as well via an
-optional third argument. This module provides two functions and an
+optional third argument.
+
+A more convenient, flexible, and powerful alternative is the
+:mod:`optparse` module.
+
+This module provides two functions and an
 exception:
 
 

Doc/library/optparse.rst

@@ -12,7 +12,7 @@
 
 
 ``optparse`` is a more convenient, flexible, and powerful library for parsing
-command-line options than ``getopt``.  ``optparse`` uses a more declarative
+command-line options than the old :mod:`getopt` module.  ``optparse`` uses a more declarative
 style of command-line parsing: you create an instance of :class:`OptionParser`,
 populate it with options, and parse the command line. ``optparse`` allows users
 to specify options in the conventional GNU/POSIX syntax, and additionally