Typo fixes.

share/man/man4/iwn.4

@@ -25,12 +25,12 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd Apri 13, 2008
+.Dd April 13, 2008
 .Os
 .Dt IWN 4
 .Sh NAME
 .Nm iwn
-.Nd "Intel Wireless WiFI Link 4965AGN IEEE 802.11n driver"
+.Nd "Intel Wireless WiFi Link 4965AGN IEEE 802.11n driver"
 .Sh SYNOPSIS
 To compile this driver into the kernel,
 include the following lines in your
@@ -61,7 +61,7 @@ The
 .Nm
 driver provides support for
 .Tn Intel
-Wireless WiFI Link 4965AGN PCI-Express network adapters.
+Wireless WiFi Link 4965AGN PCI-Express network adapters.
 .Nm
 supports
 .Cm station ,
@@ -153,7 +153,7 @@ This should not happen.
 .Xr wlan_tkip 4 ,
 .Xr wlan_wep 4 ,
 .Xr ifconfig 8 ,
-.Xr wpa_supplicant 8 .
+.Xr wpa_supplicant 8
 .Sh AUTHORS
 The original
 .Nm