net: fix comment in sendFile

Change-Id: Iacee13150b283f9d2867a7ca98f805900f7cbe50
Reviewed-on: https://go-review.googlesource.com/7943
Reviewed-by: Minux Ma <minux@golang.org>
diff --git a/src/net/sendfile_freebsd.go b/src/net/sendfile_freebsd.go
index 9b423cb..d0bf603 100644
--- a/src/net/sendfile_freebsd.go
+++ b/src/net/sendfile_freebsd.go
@@ -91,7 +91,7 @@
 		if err1 != nil {
 			// This includes syscall.ENOSYS (no kernel
 			// support) and syscall.EINVAL (fd types which
-			// don't implement sendfile together)
+			// don't implement sendfile)
 			err = err1
 			break
 		}