abort when using 'update -m' and this is not a merge
add more testcases for updating with local changes
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1 files, 1 changesets, 1 total revisions
changeset: 0:acb14030fe0a
tag: tip
user: test
date: Thu Jan 1 00:00:00 1970 +0000
summary: test
rolling back last transaction
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A a