[issue7275] CoverageResult fails to merge input file with non-empty callers in trace.py (patch)

[Mark Lawrence]

Mark Lawrence <breamoreboy at yahoo.co.uk> added the comment:

The attached patch is effectively a one liner.

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nosy: +BreamoreBoy
stage:  -> patch review
versions:  -Python 2.4, Python 2.5, Python 2.6, Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7275>
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