Fix hg push and hg push -r sometimes creating new heads without --force. Fixing issue179. The algorithm checks if there not more new heads on the remote side than heads which become non-heads due to getting children. Pushing this repo: m /\ 3 3a| |/ / 2 2a |/ 1 to a repo only having 1, 2 and 3 didn't abort requiring --force before. Added test cases for this and some doc strings for used methods.

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a

     2

checking changesets

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checking manifests

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crosschecking files in changesets and manifests

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checking files

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1 files, 1 changesets, 1 total revisions

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a not present

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checking changesets

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checking manifests

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crosschecking files in changesets and manifests

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checking files

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1 files, 1 changesets, 1 total revisions

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a