message: Improve option description.
diff: @@ -416,7 +416,7 @@ void RunParams::printHelpMessage(std::ostream& str) const
  << "\t\t --npasses 2 (runs complete Suite twice\n\n";
  str << "\t --repfact <double> [default is 1.0]\n"
  - << "\t (percentage of default # reps to run each kernel)\n";
  + << "\t (multiplier on default # reps to run each kernel)\n";
  str << "\t\t Example...\n"
  << "\t\t --repfact 0.5 (runs kernels 1/2 as many times as default)\n\n";
  