sharing the Flatbuffers warning

src/idl_gen_js.cpp

@@ -684,9 +684,7 @@ class JsGenerator : public BaseGenerator {
     generateEnums(&enum_code, &exports_code);
     generateStructs(&struct_code, &exports_code);
 
-    code +=
-        "// automatically generated by the FlatBuffers compiler, do not "
-        "modify\n\n";
+    code = code + "// " + FlatBuffersGeneratedWarning();
 
     // Generate code for all the namespace declarations.
     GenNamespaces(parser_, &code, &exports_code);