Update after review

Author: xuniq

doc/dev_guide/reference_capi/box.rst

@@ -378,9 +378,11 @@
 
     The handler returns a status code. Possible statuses:
 
-    *  ``IPROTO_REQUEST_HANDLER_OK`` -- success
-    *  ``IPROTO_REQUEST_HANDLER_ERROR`` -- error, diagnostic must be set by handler
-    *  ``IPROTO_REQUEST_HANDLER_FALLBACK`` -- fallback to the system handler
+    *   ``IPROTO_REQUEST_HANDLER_OK`` -- success
+    *   ``IPROTO_REQUEST_HANDLER_ERROR`` -- error, diagnostic must be set by handler
+        (see :ref:`box_error_set() <c_api-error-box_error_set>` and :ref:`box_error_raise() <c_api-error-box_error_raise>`)
+
+    *   ``IPROTO_REQUEST_HANDLER_FALLBACK`` -- fallback to the default system handler
 
 ..  _box_box_iproto_override-destroy:
 

doc/dev_guide/reference_capi/error.rst

@@ -64,6 +64,8 @@
 
     Clear the last error.
 
+.. _c_api-error-box_error_set:
+
 .. c:function:: int box_error_set(const char *file, unsigned line, uint32_t code, const char *format, ...)
 
     Set the last error.
@@ -76,6 +78,8 @@
 
     See also: IPROTO :ref:`error code<capi-box_error_code>`
 
+.. _c_api-error-box_error_raise:
+
 .. c:macro:: box_error_raise(code, format, ...)
 
     A backward-compatible API define.

doc/reference/reference_lua/box_iproto.rst

@@ -6,7 +6,7 @@ Submodule box.iproto
 Since :doc:`2.11.0 </release/2.11.0>`.
 
 The ``box.iproto`` submodule provides the ability to work with the network subsystem of Tarantool.
-It enables to extend :ref:`IPROTO <box_protocol>` functionality from the Lua libraries.
+It enables to extend the :ref:`IPROTO <box_protocol>` functionality from Lua.
 With this submodule, you can:
 
 *   :ref:`parse the unknown IPROTO requests types <reference_lua-box_iproto_override>`

doc/reference/reference_lua/box_iproto/override.rst

@@ -13,9 +13,9 @@ box.iproto.override()
     :param number request_type: a request type code. Possible values:
 
                                 *   a type code from :ref:`box.iproto.type <reference_lua-box_iproto_type>` (except
-                                    ``box.iproto.type.UNKNOWN``) -- override the existing request type.
+                                    ``box.iproto.type.UNKNOWN``) -- override the existing request type handler.
 
-                                *   ``box.iproto.type.UNKNOWN`` -- override an unknown request type.
+                                *   ``box.iproto.type.UNKNOWN`` -- override the handler of unknown request types.
 
     :param function handler: IPROTO request handler.
                              The signature of a handler function: ``function(sid, header, body)``, where
@@ -25,7 +25,7 @@ box.iproto.override()
                              *  ``body`` (userdata): a request body encoded as :ref:`msgpack_object <msgpack-object-methods>`
 
                              Returns ``true`` on success, otherwise ``false``. In case of failure, there is a fallback
-                             to the system handler.
+                             to the default system handler.
 
                              To reset the request handler, set the ``handler`` parameter to ``nil``.