actually fixed model feature support

src/storm/storage/jani/JSONExporter.cpp

@@ -1094,6 +1094,10 @@ namespace storm {
             jsonStruct["properties"] = properties;
         }
         
+        modernjson::json JsonExporter::finalize() {
+            jsonStruct["features"] = modernjson::json::parse(modelFeatures.toString());
+            return jsonStruct;
+        }
 
     }
 }

src/storm/storage/jani/JSONExporter.h

@@ -97,10 +97,7 @@ namespace storm {
             void convertProperties(std::vector<storm::jani::Property> const& formulas, storm::jani::Model const& model);
             void appendVariableDeclaration(storm::jani::Variable const& variable);
             
-            modernjson::json finalize() {
-                jsonStruct["features"] = modelFeatures.toString();
-                return jsonStruct;
-            }
+            modernjson::json finalize();
             
             modernjson::json jsonStruct;
             storm::jani::ModelFeatures modelFeatures;

src/storm/storage/jani/ModelFeatures.cpp

@@ -21,15 +21,16 @@ namespace storm {
         }
         
         std::string ModelFeatures::toString() const {
-            std::string res;
+            std::string res = "[";
             bool first = true;
             for (auto const& f : features) {
                 if (!first) {
                     res += ", ";
                 }
-                res += storm::jani::toString(f);
+                res += "\"" + storm::jani::toString(f) + "\"";
                 first = false;
             }
+            res += "]";
             return res;
         }