Issue a warning if "-r ." is used with two working directory parents. Rationale for not aborting instead: The first parent is usually more important as it is the local branch during a merge and commands like 'hg diff' and 'hg diff -r.' behave still identically (except for the warning of course). Added a test for log -r. with one and two parents.

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#!/bin/sh

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echo "[extensions]" >> $HGRCPATH

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echo "mq=" >> $HGRCPATH

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hg init a

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cd a

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echo 'base' > base

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hg ci -Ambase -d '1 0'

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hg qnew -mmqbase mqbase

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hg qsave

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hg qrestore 2