Comment 9 for bug 567250

The fix is on the trunk at rev 3537.

This wasn't really a critical bug after the trivial index error crasher was fixed.

From the checkin log:

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- Made **no** further changes to the fundamental algorithm.

- Made several changes to the import checks:

1. Ignore trailing ws on every line, and trailing blank lines.

2. Use difflib.Differ to report problems.

Admittedly, ignoring trailing whitespace differences isn't "perfect",
but if this isn't good enough then you should use @auto or @thin.
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I'll mark this bug closed (fix released), but feel free to reopen it if you find errors that corrupt files in any way excluding whitespace.

Edward