Improve autoload inheritance error message

Autoloaded scripts should always inherit from Node. When you run a
project that tries to autoload a script which doesn’t inherit from Node,
then Godot gives an error.

Before this change, the error said “Script does not inherit a Node”.
That error message is a little bit misleading. If a class inherits a
Node, then one of its superclasses has a Node. If a class inherits
_from_ Node, then one of its superclasses is Node. This change corrects
that mistake.

Fixes #59884.

(cherry picked from commit 1cc7e7ec33a652647d63cb32fa164eceef87c653)

editor/editor_autoload_settings.cpp

@@ -361,7 +361,7 @@ Node *EditorAutoloadSettings::_create_autoload(const String &p_path) {
 		Ref<Script> s = res;
 		StringName ibt = s->get_instance_base_type();
 		bool valid_type = ClassDB::is_parent_class(ibt, "Node");
-		ERR_FAIL_COND_V_MSG(!valid_type, nullptr, "Script does not inherit a Node: " + p_path + ".");
+		ERR_FAIL_COND_V_MSG(!valid_type, nullptr, "Script does not inherit from Node: " + p_path + ".");
 
 		Object *obj = ClassDB::instance(ibt);
 

main/main.cpp

@@ -1901,7 +1901,7 @@ bool Main::start() {
 						Ref<Script> script_res = res;
 						StringName ibt = script_res->get_instance_base_type();
 						bool valid_type = ClassDB::is_parent_class(ibt, "Node");
-						ERR_CONTINUE_MSG(!valid_type, "Script does not inherit a Node: " + path);
+						ERR_CONTINUE_MSG(!valid_type, "Script does not inherit from Node: " + path);
 
 						Object *obj = ClassDB::instance(ibt);