pci-error-recovery: doc cleanup

Include whitespace shooting; correction; typo fix; superfluous word
dropping.
Signed-off-by: NCao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/PCI/pci-error-recovery.txt

@@ -11,7 +11,7 @@
 
 Many PCI bus controllers are able to detect a variety of hardware
 PCI errors on the bus, such as parity errors on the data and address
-busses, as well as SERR and PERR errors.  Some of the more advanced
+buses, as well as SERR and PERR errors.  Some of the more advanced
 chipsets are able to deal with these errors; these include PCI-E chipsets,
 and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
 pSeries boxes. A typical action taken is to disconnect the affected device,
@@ -231,7 +231,7 @@ proceeds to STEP 4 (Slot Reset)
 STEP 3: Link Reset
 ------------------
 The platform resets the link.  This is a PCI-Express specific step
-and is done whenever a non-fatal error has been detected that can be
+and is done whenever a fatal error has been detected that can be
 "solved" by resetting the link.
 
 STEP 4: Slot Reset
@@ -258,7 +258,7 @@ configuration registers to initialize to their default conditions.
 
 For most PCI devices, a soft reset will be sufficient for recovery.
 Optional fundamental reset is provided to support a limited number
-of PCI Express PCI devices  for which a soft reset is not sufficient
+of PCI Express devices for which a soft reset is not sufficient
 for recovery.
 
 If the platform supports PCI hotplug, then the reset might be