[PATCH V2] migration: massage cpr-reboot documentation

[Steve Sistare <steven.sistare@oracle.com>]

Re-wrap the cpr-reboot documentation to 70 columns, use '@' for
cpr-reboot references, capitalize COLO and VFIO, and tweak the
wording.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 qapi/migration.json | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/qapi/migration.json b/qapi/migration.json
index c6bfe2e..c86113b 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -636,28 +636,30 @@
 #
 # @normal: the original form of migration. (since 8.2)
 #
-# @cpr-reboot: The migrate command stops the VM and saves state to the URI.
-#     After quitting qemu, the user resumes by running qemu -incoming.
+# @cpr-reboot: The migrate command stops the VM and saves state to
+#     the URI.  After quitting qemu, the user resumes by running
+#     qemu -incoming.
 #
-#     This mode allows the user to quit qemu, and restart an updated version
-#     of qemu.  The user may even update and reboot the OS before restarting,
-#     as long as the URI persists across a reboot.
+#     This mode allows the user to quit qemu, optionally update and
+#     reboot the OS, and restart qemu.  If the user reboots, the URI
+#     must persist across the reboot, such as by using a file.
 #
-#     Unlike normal mode, the use of certain local storage options does not
-#     block the migration, but the user must not modify guest block devices
-#     between the quit and restart.
+#     Unlike normal mode, the use of certain local storage options
+#     does not block the migration, but the user must not modify the
+#     contents of guest block devices between the quit and restart.
 #
-#     This mode supports vfio devices provided the user first puts the guest
-#     in the suspended runstate, such as by issuing guest-suspend-ram to the
-#     qemu guest agent.
+#     This mode supports VFIO devices provided the user first puts
+#     the guest in the suspended runstate, such as by issuing
+#     guest-suspend-ram to the qemu guest agent.
 #
-#     Best performance is achieved when the memory backend is shared and the
-#     @x-ignore-shared migration capability is set, but this is not required.
-#     Further, if the user reboots before restarting such a configuration, the
-#     shared backend must be be non-volatile across reboot, such as by backing
-#     it with a dax device.
+#     Best performance is achieved when the memory backend is shared
+#     and the @x-ignore-shared migration capability is set, but this
+#     is not required.  Further, if the user reboots before restarting
+#     such a configuration, the shared memory must persist across the
+#     reboot, such as by backing it with a dax device.
 #
-#     cpr-reboot may not be used with postcopy, colo, or background-snapshot.
+#     @cpr-reboot may not be used with postcopy, background-snapshot,
+#     or COLO.
 #
 #     (since 8.2)
 ##
-- 
1.8.3.1