page 141, incorrect indentation, countdown() middle of page

[j-q-arnold]

Page 141, countdown definition in the middle of the page.

The try block has the following code:

while n > 0:
    yield n
        n = n - 1

The n = n - 1 line has extra indentation and should align with the yield line. It generates the following error:

...         n = n - 1
  File "<stdin>", line 6
    n = n - 1
IndentationError: unexpected indent