fix: use get_string for instead of static string

Author: janbritz

lang/en/qtype_questionpy.php

@@ -32,6 +32,7 @@
 $string['attempt_step_no'] = 'Step #';
 $string['attempt_steps'] = 'Attempt Steps';
 $string['change_package'] = 'Change';
+$string['contact_administrator'] = 'Please contact an administrator.';
 $string['disable_json_formatting'] = 'Disable JSON formatting';
 $string['enable_json_formatting'] = 'Enable JSON formatting';
 $string['event_grading_response_failed'] = 'Grading response failed';
@@ -65,6 +66,7 @@
 $string['questionpy:uploadpackages'] = 'Upload custom QuestionPy packages';
 $string['questionpy:viewdetails'] = 'View technical details of QuestionPy questions';
 $string['remove_packages_button'] = 'Remove Packages';
+$string['render_error_message'] = 'There was an error attempting to view the question.';
 $string['render_error_section'] = 'An error occurred';
 $string['render_warning_invalid_value'] = 'The last submission set the field {$a->name} to the value {$a->value}, but that option is no longer available. The available options are: {$a->availablevalues}.';
 $string['render_warning_invalid_value_not_preserved'] = 'The invalid value will be overwritten the next time you save your answer.';

renderer.php

@@ -55,8 +55,8 @@ public function head_code(question_attempt $qa) {
      */
     private function render_error(): string {
         return $this->output->render_from_template('qtype_questionpy/render_error', [
-            'message' => 'There was an error attempting to view the question.',
-            'info' => 'Please contact an administrator.',
+            'message' => get_string('render_error_message', 'qtype_questionpy'),
+            'info' => get_string('contact_administrator', 'qtype_questionpy'),
         ]);
     }