mdoc style: whitespace fixes.

share/man/man4/acpi_wmi.4

@@ -64,7 +64,6 @@ Managed Object Format (MOF) blob.
 You can obtain human readable output by bmf2mof in bmfdec tool.
 (https://github.com/pali/bmfdec)
 .El
-
 .Sh EXAMPLES
 .Bd -literal
 # cat /dev/wmistat0

share/man/man4/hmt.4

@@ -39,7 +39,6 @@ your kernel configuration file:
 .Cd "device hid"
 .Cd "device hconf"
 .Cd "device evdev"
-
 .Ed
 .Pp
 Alternatively, to load the driver as a

share/man/man4/md.4

@@ -125,7 +125,6 @@ dedicate to the kmem_arena map.
 The scale value is the ratio of physical to virtual pages.
 The default value of 3 allocates a page of KVA for each 3 pages
 of physical ram in the system.
-
 The kernel and modules, including the root image, also consume KVA.
 The combination of a large root image and the default scaling
 may preallocate so much KVA that there is not enough
@@ -133,7 +132,6 @@ remaining address space to allocate kernel stacks, IO buffers,
 and other resources that are not part of kmem_arena.
 Overallocating kmem_arena space is likely to manifest as failure to
 launch userland processes with "cannot allocate kernel stack" messages.
-
 Setting the scale value too high may result in kernel failure to allocate
 memory because kmem_arena is too small, and the failure may require
 significant runtime to manifest.

share/man/man4/sa.4

@@ -340,7 +340,7 @@ driver will use the drive's recommended timeouts for commands.
 .Pp
 The timeouts in use are reported in units of
 .Sy thousandths
-of a second via the 
+of a second via the
 .Va kern.cam.sa.%d.timeout.*
 .Xr sysctl 8
 variables.

share/man/man4/vmm.4

@@ -100,5 +100,3 @@ first appeared in
 .Sh AUTHORS
 .An Neel Natu Aq neel@freebsd.org
 .An Peter Grehan Aq grehan@freebsd.org
-
-