vac(1): cleanup

man/man1/vac.1

diff --git a/man/man1/vac.1 b/man/man1/vac.1
index 7cd9466..9243feb 100644
--- a/man/man1/vac.1
+++ b/man/man1/vac.1
@@ -136,7 +136,7 @@
 .PP
 .I Unvac
 lists or extracts files stored in the vac archive
-.I vacfile ,
+.IR vacfile ,
 which can be either a vac archive string in the format
 given above or the name of a file containing one.
 If