runtime(doc): update documentation

closes: #17180

Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index eca8362..0c24b84 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1111,7 +1111,7 @@
 	getcmdwintype()		return the current command-line window type
 	getcompletion()		list of command-line completion matches
 	fullcommand()		get full command name
-	cmdcomplete_info()	get current completion information
+	cmdcomplete_info()	get command-line completion information
 
 Quickfix and location lists:			*quickfix-functions*
 	getqflist()		list of quickfix errors