Minor markup nits.

share/man/man9/physio.9

@@ -1,4 +1,4 @@
-.\"	$NetBSD: physio.9,v 1.10 2008/04/30 13:10:58 martin Exp $
+.\"	$NetBSD: physio.9,v 1.11 2010/04/13 10:06:43 jruoho Exp $
 .\"
 .\" Copyright (c) 1996 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd June 15, 1996
+.Dd April 13, 2010
 .Dt PHYSIO 9
 .Os
 .Sh NAME
@@ -47,7 +47,9 @@
 The
 .Fn physio
 is a helper function typically called from character device read and write
-routines to start I/O on a user process buffer.
+routines to start
+.Tn I/O
+on a user process buffer.
 It calls back on the provided
 .Fa strategy
 routine one or more times to complete the transfer described by
@@ -57,18 +59,21 @@ The maximum amount of data to transfer with each call to
 is determined by the
 .Fa minphys
 routine.
+.Pp
 Since
 .Fa uio
 normally describes user space addresses,
 .Fn physio
 needs to lock the appropriate data area into memory before each transaction
 with
-.Fa strategy ( see
+.Fa strategy
+(see
 .Xr uvm_vslock 9
 and
 .Xr uvm_vsunlock 9 ) .
+The
 .Fn physio
-always awaits the completion of the entire requested transfer before
+function always awaits the completion of the entire requested transfer before
 returning, unless an error condition is detected earlier.
 In all cases, the buffer passed in
 .Fa bp
@@ -77,10 +82,11 @@ is locked (marked as
 for the duration of the entire transfer.
 .Pp
 A break-down of the arguments follows:
-.Bl -tag -width indent
+.Bl -tag -width "strategy "
 .It Fa strategy
 The device strategy routine to call for each chunk of data to initiate
-device I/O.
+device
+.Tn I/O .
 .It Fa bp
 The buffer to use with the strategy routine.
 The buffer flags will have