[status] fix percentage output to two decimals

frackit/sampling/status.hh

@@ -253,8 +253,9 @@ public:
 
         std::cout << "  "      << std::string( paddingCount, ' ')    << countString + ' '
                   << "   |   " << std::string( paddingRejected, ' ') << rejectedCountString + ' '
-                  << "   |   " << std::string( paddingRatio, ' ')    << ratio << std::string(4, ' ')
-                  << "   |   " << std::string( paddingProgess, ' ')  << (hasProgess ? std::to_string(progress) : "n.a.") << std::endl;
+                  << "   |   " << std::string( paddingRatio, ' ')    << ratio << std::string(4, ' ');
+        if (hasProgess) std::cout << "   |   " << std::string( paddingProgess, ' ') << progress << std::endl;
+        else std::cout << "   |   " << std::string( paddingProgess, ' ') << "n.a" << std::endl;
     }
 
     /*!