fix error in split() examples (closes #22459)

Patch by Raúl Cumplido.
diff --git a/Misc/ACKS b/Misc/ACKS
index 2928309..4a69dfe 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -296,6 +296,7 @@
 Joaquin Cuenca Abela
 John Cugini
 Tom Culliton
+Raúl Cumplido
 Antonio Cuni
 Brian Curtin
 Lisandro Dalcin