Link to docs; remove an XXX comment

Doc/whatsnew/whatsnew25.tex

@@ -47,8 +47,7 @@ underestimates.)
 This article doesn't try to be a complete specification of the new
 features; instead changes are briefly introduced using helpful
 examples.  For full details, you should always refer to the
-documentation for Python 2.5.
-% XXX add hyperlink when the documentation becomes available online.
+documentation for Python 2.5 at \url{http://docs.python.org}.
 If you want to understand the complete implementation and design
 rationale, refer to the PEP for a particular new feature.
 
@@ -751,7 +750,6 @@ either committed, meaning that all the changes are written into the
 database, or rolled back, meaning that the changes are all discarded
 and the database is unchanged.  See any database textbook for more
 information.)
-% XXX find a shorter reference?
 
 Let's assume there's an object representing a database connection.
 Our goal will be to let the user write code like this: