tkinter: always scroll to show last line of text

[Benjamin Rutt]

I have a tkinter 'Text' and 'Scrollbar' connected and working
normally.  When a new line of text is inserted (because I'm monitoring
an output stream), I'd like the text and scrollbar to be scrolled to
the bottom, so the latest line of text is always shown.  How to do
this?  Thanks,
-- 
Benjamin Rutt