grep: display correct user/revision for --all in reverse. Also handle multiple occurrences of the same line by storing linestates in an array instead of a dict, and using difflib to compute the difference between linestates.

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#!/bin/sh

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unset HGUSER

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EMAIL="My Name <myname@example.com>"

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export EMAIL

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hg init test

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cd test

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touch asdf

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hg add asdf

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hg commit -d '1000000 0' -m commit-1

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hg tip