Update runtime files.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index fd2ae6a..949d82f 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 8.1.  Last change: 2019 May 23
+*options.txt*	For Vim version 8.1.  Last change: 2019 May 25
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar