Update runtime files
diff --git a/runtime/doc/map.txt b/runtime/doc/map.txt
index 6beae6e..f1bfd75 100644
--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -1,4 +1,4 @@
-*map.txt* For Vim version 9.0. Last change: 2022 Jun 18
+*map.txt* For Vim version 9.0. Last change: 2022 Sep 12
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1583,7 +1583,7 @@
For the "custom" argument, the function should return the completion
candidates one per line in a newline separated string.
-
+ *E1303*
For the "customlist" argument, the function should return the completion
candidates as a Vim List. Non-string items in the list are ignored.