code: public static String getStandardDeviationString(double[] standardDeviationDoubles) {
          if (standardDeviationDoubles == null) {
              return null;
          }
          StringBuilder standardDeviationString = new StringBuilder(standardDeviationDoubles.length * 9);
          // Abbreviate to 2 decimals
          // We don't use a local sensitive DecimalFormat, because other Scores don't use it either (see PLANNER-169)
          DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols(Locale.US);
          DecimalFormat exponentialFormat = new DecimalFormat("0.0#E0", decimalFormatSymbols);
          DecimalFormat decimalFormat = new DecimalFormat("0.0#", decimalFormatSymbols);
          boolean first = true;
          for (double standardDeviationDouble : standardDeviationDoubles) {
              if (first) {
                  first = false;
              } else {
                  standardDeviationString.append("/");
              }
              // See http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#toString%28double%29
              String abbreviated;
              if (0.001 <= standardDeviationDouble && standardDeviationDouble <= 10000000.0) {
                  abbreviated = decimalFormat.format(standardDeviationDouble);
              } else {
                  abbreviated = exponentialFormat.format(standardDeviationDouble);
              }
              standardDeviationString.append(abbreviated);
          }
          return standardDeviationString.toString();
      }
docs: TODO Do the locale formatting in benchmarkReport.html.ftl - https://issues.jboss.org/browse/PLANNER-169