phase: report number of non-public changeset alongside the new range
When interacting with non-publishing repository or bundle, it is useful to
have some information about the phase of the changeset we just pulled.
This changeset updates the "new changesets MIN:MAX" output to also includes
phases information for non-public changesets. Displaying extra data about
non-public changesets means the output for exchange with publishing repository
(the default) is unaffected.
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