Index: share/man/man9/style.9
===================================================================
--- share/man/man9/style.9
+++ share/man/man9/style.9
@@ -26,7 +26,7 @@
 .\"	From: @(#)style	1.14 (Berkeley) 4/28/95
 .\" $FreeBSD$
 .\"
-.Dd November 1, 2018
+.Dd May 28, 2019
 .Dt STYLE 9
 .Os
 .Sh NAME
@@ -777,11 +777,14 @@
 }
 
 static void
-usage()
+usage(void)
 {
 	/* Insert an empty line if the function has no local variables. */
 .Ed
 .Pp
+An empty line may be excluded if the function has no local variables and is
+less than four lines long.
+.Pp
 Use
 .Xr printf 3 ,
 not