Enable demandimport only in scripts, not in importable modules (issue605)
This way other applications can choose if and when they want this feature,
because it might be problematic if those applications rely on ImportError.
abort: repository a not found!
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abort: error: Connection refused
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abort: repository a not found!
255
abort: destination '../a' already exists
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abort: repository a not found!
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destination directory: q
abort: destination 'q' already exists