[Tutor] Upgrading 2.2 to 2.3

[Tim Peters]

[Tim]
> It varies across platforms.  On Windows (any flavor, Win9x, Win2K,
> etc), you can have any number of different "minor" Python releases
> installed simultaneously.  "minor" == the second digit, so, e.g., I
> have Python 2.2.1, 2.2.3, and 2.3 all installed on my Windows box.
              ^^^^^
That should have said 2.1.3; sorry!