message: Explicitly delete the Mesh copy assignment operator
diff: @@ -505,6 +505,9 @@ public:
  /// Move assignment operstor.
  Mesh& operator=(Mesh &&mesh);
  + /// Explicitly delete the copy assignment operator.
  + Mesh& operator=(Mesh &mesh) = delete;
  +
  /** @name Named mesh constructors.
  Each of these constructors uses the move constructor, and can be used as
  