message: Clarify the integer string formatting
diff: @@ -62,7 +62,7 @@ than in other usage patterns, since a Group on one rank will end up with data
  from multiple ranks. An integer scalar View named ``reduced_input_ranks``
  will be added to the Group with the value being the number of ranks that
  wrote the files. The data from each output rank will be read into subgroups
  -located at ``rank_*******/sidre_input`` in the input Group's data hierarchy.
  +located at ``rank_{%07d}/sidre_input`` in the input Group's data hierarchy.
  .. warning::
  If ``read()`` is called to read data that was created on a larger
  