om Phabricator suitable for importing

    DREVSPEC could be a Differential Revision identity, like ``D123``, or just
    the number ``123``. It could also have common operators like ``+``, ``-``,
    ``&``, ``(``, ``)`` for complex queries. Prefix ``:`` could be used to
    select a stack.  If multiple DREVSPEC values are given, the result is the
    union of each individually evaluated value.  No attempt is currently made
    to reorder the values to run from parent to child.

    ``abandoned``, ``accepted``, ``closed``, ``needsreview``, ``needsrevision``
    could be used to filter patches by status. For performance reason, they
    only represent a subset of non-status selections and cannot be used alone.

    For example, ``:D6+8-(2+D4)`` selects a stack up to D6, plus D8 and exclude
    D2 and D4. ``:D9 & needsreview`` selects "Needs Review" revisions in a
    stack up to D9.

    If --stack is given, follow dependencies information and read all patches.
    It is equivalent to the ``:`` operator.
    r