def marshalled_specs( spec_a )
      a = spec_a.collect { |s| s.to_rubygems_a }
      marshal( optimize_specs( a ) )
    end
def marshalled_specs( spec_a )
      a = spec_a.collect { |s| s.to_rubygems_a }
      marshal( optimize_specs( a ) )
    end
Convert to the array format used by gem servers
 everywhere