Fix #23196: running python scripts didn't do an undo push. Now it does

means you can easily undo what the script did, and keeps the undo stack
up to date. Maybe sometimes it's not necessary, but I think it's
reasonable to do this always.

source/blender/editors/space_text/text_ops.c

@@ -584,8 +584,10 @@ void TEXT_OT_run_script(wmOperatorType *ot)
 	/* api callbacks */
 	ot->poll= run_script_poll;
 	ot->exec= run_script_exec;
-}
 
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+}
 
 /******************* refresh pyconstraints operator *********************/