[#2442] code-block without argument not allowed

Plus a few typo fixes.

doc/sphinx/arm/dhcp4-srv.rst

@@ -5592,7 +5592,7 @@ If not specified, the default value is:
  As soon as a host reservation is found the search is stopped so
  when a client has two host reservations using different enabled
  identifier types the first is always returned and the second
- ignored. In other words, this is usually a a configuration mistake.
+ ignored. In other words, this is usually a configuration mistake.
  In rare cases when having two reservations for the same host makes sense,
  you can control which of those will be used by ordering the list of
  identifier types in `host-reservation-identifiers`.

doc/sphinx/arm/dhcp6-srv.rst

@@ -4809,7 +4809,7 @@ If not specified, the default value is:
  As soon as a host reservation is found the search is stopped so
  when a client has two host reservations using different enabled
  identifier types the first is always returned and the second
- ignored. In other words, this is usually a a configuration mistake.
+ ignored. In other words, this is usually a configuration mistake.
  In rare cases when having two reservations for the same host makes sense,
  you can control which of those will be used by ordering the list of
  identifier types in `host-reservation-identifiers`.

doc/sphinx/arm/hooks-radius.rst

@@ -427,25 +427,25 @@ set up to enable basic functionality in Kea.
  client ID, which would need to be dynamically set in the hook library's
  configuration. Here's how the entries can look like:
 
-  .. code-block::
+ ::
 
-  01:00:0c:01:02:03:04 Cleartext-password := "00:0c:01:02:03:04"
+ 01:00:0c:01:02:03:04 Cleartext-password := "00:0c:01:02:03:04"
 
-  01:00:0c:01:02:03:05 Cleartext-password := "00:0c:01:02:03:05"
-  Framed-IP-Address = "192.0.2.5"
+ 01:00:0c:01:02:03:05 Cleartext-password := "00:0c:01:02:03:05"
+ Framed-IP-Address = "192.0.2.5"
 
-  01:00:0c:01:02:03:06 Cleartext-password := "00:0c:01:02:03:06"
-  Framed-IP-Address = "192.0.2.6"
-  Framed-Pool = "classical"
+ 01:00:0c:01:02:03:06 Cleartext-password := "00:0c:01:02:03:06"
+ Framed-IP-Address = "192.0.2.6"
+ Framed-Pool = "classical"
 
-  00:03:00:01:00:0c:01:02:03:07 Cleartext-password := "00:0c:01:02:03:07"
+ 00:03:00:01:00:0c:01:02:03:07 Cleartext-password := "00:0c:01:02:03:07"
 
-  00:03:00:01:00:0c:01:02:03:08 Cleartext-password := "00:0c:01:02:03:08"
-  Framed-IPv6-Address = "2001:db8::8"
+ 00:03:00:01:00:0c:01:02:03:08 Cleartext-password := "00:0c:01:02:03:08"
+ Framed-IPv6-Address = "2001:db8::8"
 
-  00:03:00:01:00:0c:01:02:03:09 Cleartext-password := "00:0c:01:02:03:09"
-  Framed-IPv6-Address = "2001:db8::9"
-  Framed-Pool = "classroom"
+ 00:03:00:01:00:0c:01:02:03:09 Cleartext-password := "00:0c:01:02:03:09"
+ Framed-IPv6-Address = "2001:db8::9"
+ Framed-Pool = "classroom"
 
 7. Accounting should work out of the box with Kea, but customizations are
  possible in the accounting file, which can be commonly found at:

doc/sphinx/arm/hooks.rst

@@ -502,7 +502,7 @@ loaded by the correct process per the table below.
  | | | (JSON over UNIX sockets) and the Control Agent (JSON over |
  | | | RESTful interface). |
  +-----------------------------------------------------------+--------------+--------------------------------------------------------------+
- | :ref:`Lease Commands <hooks-lease-cmds>` | Kea open | This hook library offers a number of  commands used to |
+ | :ref:`Lease Commands <hooks-lease-cmds>` | Kea open | This hook library offers a number of commands used to  |
  | | source | manage leases. Kea can store lease information in various |
  | | | backends: memfile, MySQL, PostgreSQL. This library provides |
  | | | a unified interface to manipulate leases in an unified, safe |