Disable copying of model diagrams

src/package_diagram/model/diagram.h

@@ -34,7 +34,6 @@ public:
 
     diagram(const diagram &) = delete;
     diagram(diagram &&) = default;
-
     diagram &operator=(const diagram &) = delete;
     diagram &operator=(diagram &&) = default;
 

src/package_diagram/model/package.h

@@ -39,8 +39,8 @@ public:
 
     package(const package &) = delete;
     package(package &&) = default;
-
     package &operator=(const package &) = delete;
+    package &operator=(package &&) = default;
 
     std::string full_name(bool relative) const override;