ignore pretty tests for this file since it exercises a known bug.

Author: pnkfelix

src/test/run-pass/issue-23338-ensure-param-drop-order.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-pretty : (#23623) problems when  ending with // comments
+
 // This test is ensuring that parameters are indeed dropped after
 // temporaries in a fn body.