Standardize renaming notes.

Doc/library/htmllib.rst

@@ -157,8 +157,10 @@ additional methods and instance variables for use within tag methods.
 .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
 
 .. note::
+
    The :mod:`htmlentitydefs` module has been renamed to :mod:`html.entities` in
-   Python 3.0.
+   Python 3.0.  The :term:`2to3` tool will automatically adapt imports when
+   converting your sources to 3.0.
 
 
 This module defines three dictionaries, ``name2codepoint``, ``codepoint2name``,

Doc/library/htmlparser.rst

@@ -6,8 +6,10 @@
    :synopsis: A simple parser that can handle HTML and XHTML.
 
 .. note::
-   The :mod:`HTMLParser` module has been renamed to
-   :mod:`html.parser` in Python 3.0.
+
+   The :mod:`HTMLParser` module has been renamed to :mod:`html.parser` in Python
+   3.0.  The :term:`2to3` tool will automatically adapt imports when converting
+   your sources to 3.0.
 
 
 .. versionadded:: 2.2