Make mangler a class and reformat graph.

code/compiler/13/mangler.hpp

@@ -2,8 +2,10 @@
 #include <string>
 #include <map>
 
-struct mangler {
-    std::map<std::string, int> occurence_count;
+class mangler {
+    private:
+        std::map<std::string, int> occurence_count;
 
-    std::string new_mangled_name(const std::string& str);
+    public:
+        std::string new_mangled_name(const std::string& str);
 };