Added more file-handling related cross-references.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 6c03472..1261547 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -766,8 +766,9 @@
Python enforces that the mode, after stripping ``'U'``, begins with ``'r'``,
``'w'`` or ``'a'``.
- See also the :mod:`fileinput` module, the :mod:`os` module, and the
- :mod:`os.path` module.
+ Python provides many file handling modules including
+ :mod:`fileinput`, :mod:`os`, :mod:`os.path`, :mod:`tempfile`, and
+ :mod:`shutil`.
.. versionchanged:: 2.5
Restriction on first letter of mode string introduced.