+=== 2.3.5 / 2.4.2 / 2.5 ===
+
+* The special value question_attempt::PARAM_CLEANHTML_FILES that could be used
+ in the get_expected_data method was renamed to question_attempt::PARAM_RAW_FILES
+ in order to fix a bug. We failed to think this throught, and so did not realised
+ that this might break some question types. If this affected your question type,
+ please accept our apologies. Details in MDL-37847.
+
+