undo change to get along with google code/hg/foreign systems.

Reference: /n/atom/patch/applied/usb4nit
Date: Wed Mar 19 14:38:31 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/man/4/usb	Wed Mar 19 14:36:58 2014
+++ /sys/man/4/usb	Wed Mar 19 14:36:59 2014
@@ -8,7 +8,7 @@
 probe,
 serial,
 usbeject,
-usbfat
+usbfat:,
 usbsd
 \- Universal Serial Bus device drivers
 .SH SYNOPSIS