Fix the "tox -e docs" command failed

- cinder-guide.rst:34: D001 Line too long
- swift-guide.rst:16: D001 Line too long

Change-Id: I32e7aeeaee98b8859f257bf173d24295fbe4dd6b

doc/cinder-guide.rst

@@ -31,8 +31,8 @@ a real physical volume or a loopback mounted file for development.
 Create a Volume Group
 =====================
 When using the ``lvm`` backend, a volume group will need to be created on each
-storage node.  Use ``pvcreate`` and ``vgcreate`` to create the volume group. For
-example with the devices ``/dev/sdb`` and ``/dev/sdc``:
+storage node.  Use ``pvcreate`` and ``vgcreate`` to create the volume group.
+For example with the devices ``/dev/sdb`` and ``/dev/sdc``:
 
 ::
 

doc/swift-guide.rst

@@ -13,8 +13,8 @@ Disks with a partition table (recommended)
 ==========================================
 
 Swift requires block devices to be available for storage. To prepare a disk
-for use as a Swift storage device, a special partition name and filesystem label
-need to be added.
+for use as a Swift storage device, a special partition name and filesystem
+label need to be added.
 
 The following should be done on each storage node, the example is shown
 for three disks: