10229 Some man pages have incorrect cross-references

@@ -134,11 +134,11 @@
 .Xr usbsprl 7D ,
 .Xr usbvc 7D ,
 .Xr virtualkm 7D ,
 .Xr xhci 7D ,
 .Xr Intro 9F ,
-.Xr Intro 9S)
+.Xr Intro 9S
 .Pp
 .Rs
 .%T Writing Device Drivers
 .Re
 .Rs