Issue 21575:  Show list.sort() arguments in the tutorial.
diff --git a/Misc/ACKS b/Misc/ACKS
index f25da5e..7bf20c8 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -447,6 +447,7 @@
 Xavier de Gaye
 Harry Henry Gebel
 Marius Gedminas
+Jan-Philip Gehrcke
 Thomas Gellekum
 Gabriel Genellina
 Christos Georgiou