Update the example for Mercurial in "Separation of Issue Dependencies".

Add a note about newline translation on Windows.

pep-0374.txt

@@ -331,8 +331,8 @@ Minimally, you should set your user name. To do so, create the file
   [ui]
   username = Firstname Lastname <email.address@example.com>
 
-If you are using Windows, enable the win32text extension to use
+If you are using Windows and your tools do not support Unix-style newlines,
-Unix-style newlines by adding to your configuration::
+you can enable automatic newline translation by adding to your configuration::
 
   [extensions]
   win32text =
@@ -1061,28 +1061,29 @@ now-redundant fix-socket thread.
 
 hg
 ''
+
+One approach is to use the shelve extension; this extension is not included
+with Mercurial, but it is easy to install. With shelve, you can select changes
+to put temporarily aside.
 ::
 
     hg clone trunk issue0000
     cd issue0000
     # Edit some code (e.g. urllib).
-    cd ..
+    hg shelve
-    hg clone trunk fix-socket-bug
+    # Select changes to put aside
-    cd fix-socket-bug
     # Edit some other code (e.g. socket).
     hg commit
-    cd ../issue0000
+    hg unselve
-    hg pull ../fix-socket-bug
+    # Complete initial fix.
-    hg merge
-    # Edit some more code.
     hg commit
-    cd ../trunk
-    hg pull ../issue0000
-    hg merge
-    hg push
     cd ..
-    rm -rf issue0000 fix-socket-bug
+    rm -rf issue0000
 
+Several other way to approach this scenario with Mercurial. Alexander Solovyov
+presented a few `alternative approaches`_ on Mercurial's mailing list.
+
+.. _alternative approaches: http://selenic.com/pipermail/mercurial/2009-January/023710.html
 
 git
 '''