Add a note about the TextMate bundle and its command to help deprecate modules

for removal.

pep-3108.txt

@@ -887,6 +887,9 @@ In Python 2.6
               stacklevel=2)
      del warnpy3k
 
+   (the Python-Dev TextMate bundle, available from ``Misc/TextMate``,
+   contains a command that will generate all of this for you).
+
 #. Update the documentation. For modules with their own documentation
    file, use the ``:deprecated:`` option for the ``module`` directive.
    For modules simply listed in a file (e.g., ``undoc.rst``), use the