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212
rev1 = subtree.commit('commit in subdir')
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rev1_tree = subtree.basis_tree()
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self.addCleanup(rev1_tree.unlock)
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rev2 = subtree.commit('second commit in subdir', allow_pointless=True)
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rev2_tree = subtree.basis_tree()
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self.addCleanup(rev2_tree.unlock)
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tree.branch.pull(subtree.branch)