patch 8.2.5000: no patch for documentation updates

Problem:    No patch for documentation updates.
Solution:   Update documentation files.
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 781f8eb..29cc506 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 8.2.  Last change: 2022 May 10
+*builtin.txt*	For Vim version 8.2.  Last change: 2022 May 21
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar