diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 266ab46..84969b2 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 8.2.  Last change: 2021 Apr 17
+*options.txt*	For Vim version 8.2.  Last change: 2021 Apr 28
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4564,7 +4564,8 @@
 	Keywords are used in searching and recognizing with many commands:
 	"w", "*", "[i", etc.  It is also used for "\k" in a |pattern|.  See
 	'isfname' for a description of the format of this option.  For '@'
-	characters above 255 check the "word" character class.
+	characters above 255 check the "word" character class (any character
+	that is not white space or punctuation).
 	For C programs you could use "a-z,A-Z,48-57,_,.,-,>".
 	For a help file it is set to all non-blank printable characters except
 	'*', '"' and '|' (so that CTRL-] on a command finds the help for that