py-newline-and-indent fails to clean up spurious trailing whitespace

[Barry Warsaw]

In the code snippet, the *'s represent trailing whitespace and the X represents point:

def foo():**********X

Now hit return, i.e. py-newline-and-indent. You're indented correctly and the new line you're left on has its trailing whitespace cleaned up (though there usually probably won't be any). However, the previous line, i.e. the def foo line still contains trailing whitespace.

At one point python-mode cleaned this up properly too. I suspect that a refactoring of py-n-a-i moved the whitespace cleanup to the wrong place.