New sentence, new line.

Remove trailing whitespace.

share/man/man4/rnd.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: rnd.4,v 1.13 2009/02/22 11:04:03 plunky Exp $
+.\"	$NetBSD: rnd.4,v 1.14 2009/02/22 12:18:32 wiz Exp $
 .\"
 .\" Copyright (c) 1997 Michael Graff
 .\" All rights reserved.
@@ -38,29 +38,32 @@
 The
 .Nm
 pseudo-device uses event timing information collected from many
-devices, and mixes this into an entropy pool.  This pool is stirred
-with a cryptographically strong hash function when data is extracted
-from the pool.
+devices, and mixes this into an entropy pool.
+This pool is stirred with a cryptographically strong hash function
+when data is extracted from the pool.
 .Sh INTERNAL ENTROPY POOL MANAGEMENT
 When a hardware event occurs (such as completion of a hard drive
 transfer or an interrupt from a network device) a timestamp is
-generated.  This timestamp is compared to the previous timestamp
+generated.
+This timestamp is compared to the previous timestamp
 recorded for the device, and the first, second, and third order
 differentials are calculated.
 .Pp
 If any of these differentials is zero, no entropy is assumed to
-have been gathered.  If all are non-zero, one bit is assumed.
+have been gathered.
+If all are non-zero, one bit is assumed.
 Next, data is mixed into the entropy pool using an LFSR (linear
 feedback shift register).
 .Pp
 To extract data from the entropy pool, a cryptographically strong hash
-function is used.  The output of this hash is mixed back into the pool
-using the LFSR, and then folded in half before being returned to the
-caller.
+function is used.
+The output of this hash is mixed back into the pool using the LFSR,
+and then folded in half before being returned to the caller.
 .Pp
 Mixing the actual hash into the pool causes the next extraction to
 return a different value, even if no timing events were added to the
-pool.  Folding the data in half prevents the caller to derive the
+pool.
+Folding the data in half prevents the caller to derive the
 actual hash of the pool, preventing some attacks.
 .Sh USER ACCESS
 User code can obtain random values from the kernel in two ways.
@@ -68,14 +71,17 @@ User code can obtain random values from the kernel in two ways.
 Reading from
 .Pa /dev/random
 will only return values while sufficient entropy exists in the
-internal pool.  When sufficient entropy does not exist, EAGAIN is
-returned for non-blocking reads, or the read will block for blocking
-reads.
+internal pool.
+When sufficient entropy does not exist,
+.Er EAGAIN
+is returned for non-blocking reads, or the read will block for
+blocking reads.
 .Pp
 Reading from
 .Pa /dev/urandom
 will return as many values as requested, even when the entropy pool is
-empty.  This data is not as good as reading from
+empty.
+This data is not as good as reading from
 .Pa /dev/random
 since when the pool is empty, data is still returned, degenerating to a
 pseudo-random generator.
@@ -99,20 +105,25 @@ typedef struct {
 .Ed
 .Pp
 This structure holds the internal representation of a device's timing
-state.  The
+state.
+The
 .Va name
-field holes the device name, as known to the kernel.  The
+field holes the device name, as known to the kernel.
+The
 .Va last_time
 entry is the timestamp of the last time this device generated an
-event.  It is for internal use only, and not in any specific
-representation.  The
+event.
+It is for internal use only, and not in any specific representation.
+The
 .Va last_delta
 and
 .Va last_delta2
-fields hold the last first- and second-order deltas.  The
+fields hold the last first- and second-order deltas.
+The
 .Va total
 field holds a count of how many bits this device has potentially
-generated.  This is not the same as how many bits were used from it.
+generated.
+This is not the same as how many bits were used from it.
 The
 .Va type
 field holds the device type.
@@ -122,7 +133,8 @@ Currently, these types are defined:
 .It Dv RND_TYPE_DISK
 The device is a physical hard drive.
 .It Dv RND_TYPE_NET
-The device is a network interface.  By default, timing information is
+The device is a network interface.
+By default, timing information is
 collected from this source type, but entropy is not estimated.
 .It Dv RND_TYPE_TAPE
 The device is a tape device.
@@ -144,7 +156,8 @@ Do not even add timing information to the pool.
 Various
 .Xr ioctl 2
 functions are available to control device behavior, gather statistics,
-and add data to the entropy pool.  These are all defined in the
+and add data to the entropy pool.
+These are all defined in the
 .Aq Pa sys/rnd.h
 file, along with the data types and constants.
 .Pp
@@ -187,8 +200,8 @@ and returning at most
 sources.
 .Pp
 The values returned are actual in-kernel snapshots of the entropy
-status for devices.  Leaking the internal timing information will
-weaken security.
+status for devices.
+Leaking the internal timing information will weaken security.
 .It Dv RNDGETSRCNAME
 .Pq Li "rndstat_name_t"
 .Bd -literal -offset indent
@@ -210,19 +223,23 @@ typedef struct {
 } rndctl_t;
 .Ed
 .Pp
-Change bits in the device state information.  If
+Change bits in the device state information.
+If
 .Va type
 is 0xff, only the device name stored in
 .Va name
-is used.  If it is any other value, all devices of type
+is used.
+If it is any other value, all devices of type
 .Va type
-are altered.  This allows all network interfaces to be disabled for
+are altered.
+This allows all network interfaces to be disabled for
 entropy collection with one call, for example.
 The
 .Va flags
 and
 .Va mask
-work together to change flag bits.  The
+work together to change flag bits.
+The
 .Va mask
 field specifies which bits in
 .Va flags