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As part of reviewing CMR #4860, I talked through r32517 with Ralph. In attempt to fix various rsh quoting problems, r32517 removed all the quoting from the main code path and then only added it back in at the end in some cases. This commit puts back the quoting parts that were removed in r32517 (r32517 fixed 2 other important bugs: a) change "--<foo>" to "--mca <foo_equivalent> 1" so that de-duplication works, and b) change a != to ==). refs trac:4860 This commit was SVN r32524. The following SVN revision numbers were found above: r32517 --> open-mpi/ompi@7342bce58f The following Trac tickets were found above: Ticket 4860 --> https://svn.open-mpi.org/trac/ompi/ticket/4860