applications: serial_lte_modem: Fix #XHTTPCRSP's documentation

The advertised syntax was incorrect and contradictory
to examples appearing on the same page.
It now reflects the actual syntax used by the SLM.

Signed-off-by: Tomi Fontanilles <tomi.fontanilles@nordicsemi.no>

applications/serial_lte_modem/doc/HTTPC_AT_commands.rst

@@ -45,9 +45,9 @@ Response syntax
 
 ::
 
- #XHTTPCCON=<state>
+ #XHTTPCCON: <state>
 
-* The ``<state>`` value can return one of the following:
+* ``<state>`` is one of the following:
 
  * ``0`` - Disconnected
  * ``1`` - Connected
@@ -78,7 +78,7 @@ Response syntax
 
 ::
 
- XHTTPCCON: <state>,<host>,<port>[,<sec_tag>]]
+ XHTTPCCON: <state>,<host>,<port>[,<sec_tag>]
 
 Example
 ~~~~~~~
@@ -151,9 +151,9 @@ Response syntax
 
 ::
 
- #XHTTPCREQ:<state>
+ #XHTTPCREQ: <state>
 
-The ``<state>`` value can return one of the following:
+``<state>`` is one of the following:
 
 * ``0`` - Request sent successfully
 * ``1`` - Wait for payload data
@@ -245,13 +245,12 @@ Syntax
 
 ::
 
- #XHTTPCRSP=<byte_received>,<state><CR><LF><response>
+ <response><CR><LF>#XHTTPCRSP:<received_byte_count>,<state>
 
-* The ``<byte_received>`` is an integer.
+* ``<response>`` is the raw data of the HTTP response, including headers and body.
+* ``<received_byte_count>`` is an integer.
  It represents the length of a partially received HTTP response.
-* The ``<state>`` value can return one of the following:
+* ``<state>`` is one of the following:
 
  * ``0`` - There is more HTTP response data to come.
  * ``1`` - The entire HTTP response has been received.
-
-* The ``<response>`` is the raw data of the HTTP response, including headers and body.