[issue2142] naive use of ''.join(difflib.unified_diff(...)) results in bogus diffs with inputs that don't end with end-of-line char (same with context_diff)

[Mark Dickinson]

Changes by Mark Dickinson <dickinsm at gmail.com>:


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versions: +Python 2.7, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue2142>
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