Added missing , in output

tools/python/src/shape_predictor.h

@@ -113,7 +113,7 @@ namespace dlib
             << "lambda_param=" << o.lambda_param << ","
             << "num_test_splits=" << o.num_test_splits << ","
             << "feature_pool_region_padding=" << o.feature_pool_region_padding << ","
-            << "random_seed=" << o.random_seed
+            << "random_seed=" << o.random_seed << ","
             << "num_threads=" << o.num_threads
         << ")";
         return sout.str();