fix some small typos and formattings bits

Reference: /n/atom/patch/applied/man8nits
Date: Thu Mar 13 13:19:00 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/man/8/pci	Thu Mar 13 13:18:20 2014
+++ /sys/man/8/pci	Thu Mar 13 13:18:20 2014
@@ -26,8 +26,9 @@
 .I width
 .I value
 .SH DESCRIPTION
-.I Pci
-normally prints one line per device found on the local PCI bus
+With no options,
+.I pci
+prints one line per device found on the local PCI bus
 described by
 .BR #$/pci .
 The fields are
@@ -48,10 +49,10 @@
 .BR /lib/pci .
 A second
 .B -v
-adds a second line of description based on the OEM.
+includes a second line of description based on the
+sub-DID and sub-VID.
 .PP
-.PP
-Arbirary devices may also be looked up by giving their
+The description for arbirary devices may be found by giving their
 PCI vendor and device ids on the command line. Specifying
 a
 .IR bdf s
--- /sys/man/8/diskparts	Thu Mar 13 13:18:21 2014
+++ /sys/man/8/diskparts	Thu Mar 13 13:18:21 2014
@@ -42,10 +42,13 @@
 .TF /dev/sd[C-H]?/ctl
 .TP
 .B /dev/sd[C-H]?/ctl
-storage interface control files for IDE devices
+storage interface control files for
+.SM IDE
+devices
 .PD
 .SH SOURCE
-.B /rc/bin
+.B /rc/bin/diskparts
 .SH SEE ALSO
 .IR sd (3),
+.IR sdloop (3),
 .IR partfs (8)