Fix walkhelper on windows. The ''seen'' dictionary stores paths in canonical form, so the walkhelp must also provide paths in that form, otherwise the changed files are listed twice.

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syntax: glob

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*.elc

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*.orig

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*.rej

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*~

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*.so

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*.pyc

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*.swp

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*.prof

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tests/*.err

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build

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dist

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doc/*.[0-9]

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doc/*.[0-9].{x,ht}ml

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MANIFEST

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patches

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mercurial/__version__.py

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syntax: regexp

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^\.pc/