message: Added some explanatory content to help message.
diff: @@ -324,19 +324,27 @@ void RunParams::printHelpMessage(std::ostream& str) const
  str << "\t --print-variants, -pv (prints valid variant names}\n\n";
  str << "\t --npasses <int> [default is 1]\n"
  - << "\t (num passes through suite)\n\n";
  + << "\t (num passes through suite)\n";
  + str << "\t\t Example...\n"
  + << "\t\t --npasses 2 (runs complete suite twice\n\n";
  str << "\t --repfact <double> [default is 1.0]\n"
  - << "\t (% of default # reps to run each kernel)\n\n";
  + << "\t (fraction of 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";
  str << "\t --sizefact <double> [default is 1.0]\n"
  - << "\t (% of default kernel iteration space size to run)\n\n";
  + << "\t (fraction of default kernel iteration space size to run)\n";
  + str << "\t\t Example...\n"
  + << "\t\t --repfact 2.0 (kernel loops will be twice as long as default)\n\n";
  - str << "\t --sizespec <string> [one of : mini,small,medium,large,extralarge (anycase)]\n"
  + str << "\t --sizespec <string> [one of : mini,small,medium,large,extralarge (anycase) -- default is medium]\n"
  << "\t (used to set specific sizes for certain kernels : e.g. polybench)\n\n";
  - str << "\t --pass-fail-tol, -pftol <double> [default is 0.1]\n"
  - << "\t (slowdown tolerance for RAJA vs. Base variants for pass/fail)\n\n";
  + str << "\t --pass-fail-tol, -pftol <double> [default is 0.1; i.e., 10%]\n"
  + << "\t (slowdown fail tolerance for RAJA vs. Base variants in FOM report)\n";
  + str << "\t\t Example...\n"
  + << "\t\t -pftol 0.2 (RAJA kernel variants that run 20% or more slower than Base variants will be reported as FAIL in FOM report)\n\n";
  str << "\t --outdir, -od <string> [Default is current directory]\n"
  << "\t (directory path for output data files)\n";
  @@ -368,10 +376,12 @@ void RunParams::printHelpMessage(std::ostream& str) const
  str << "\t\t Example...\n"
  << "\t\t -refvar Base_Seq (speedups reported relative to Base_Seq variants)\n\n";
  - str << "\t --dryrun (print summary of how suite will run without running)\n\n";
  -
  str << "\t --checkrun <int> [default is 1]\n"
  -<< "\t (num reps to run each kernel, typically small value to check things are working)\n\n";
  +<< "\t (run each kernel given number of times; usually to check things are working)\n";
  + str << "\t\t Example...\n"
  + << "\t\t --checkrun 2 (run each kernel twice)\n\n";
  +
  + str << "\t --dryrun (print summary of how suite will run without running)\n\n";
  str << std::endl;
  str.flush();
  