fix missing space (clang format)

src/idl_gen_cpp.cpp

@@ -40,7 +40,7 @@ class CppGenerator : public BaseGenerator {
   CppGenerator(const Parser &parser, const std::string &path,
                const std::string &file_name)
       : BaseGenerator(parser, path, file_name, "", "::"),
-      cur_name_space_(nullptr){};
+        cur_name_space_(nullptr){};
   // Iterate through all definitions we haven't generate code for (enums,
   // structs,
   // and tables) and output them to a single file.