Correctly check scripts that must inherit `EditorPlugin`

Also updates some error messages related to this kind of check
across the codebase.

1 files changed, 3 insertions, 3 deletions

diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 32da37ad27..216eb17cb9 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -3454,13 +3454,13 @@ void EditorNode::set_addon_plugin_enabled(const String &p_addon, bool p_enabled,
 		}
 
 		// Plugin init scripts must inherit from EditorPlugin and be tools.
-		if (String(scr->get_instance_base_type()) != "EditorPlugin") {
-			show_warning(vformat(TTR("Unable to load addon script from path: '%s' Base type is not EditorPlugin."), script_path));
+		if (!ClassDB::is_parent_class(scr->get_instance_base_type(), "EditorPlugin")) {
+			show_warning(vformat(TTR("Unable to load addon script from path: '%s'. Base type is not 'EditorPlugin'."), script_path));
 			return;
 		}
 
 		if (!scr->is_tool()) {
-			show_warning(vformat(TTR("Unable to load addon script from path: '%s' Script is not in tool mode."), script_path));
+			show_warning(vformat(TTR("Unable to load addon script from path: '%s'. Script is not in tool mode."), script_path));
 			return;
 		}
 	}