test+correct examples+links as far as end of user guide

doc/sphinx/book/app/c_lua_tutorial.rst

@@ -505,8 +505,9 @@ that are declared in line 1, because all of them are for use only within the fun
 
 **LINE 5: WHY "PAIRS()".** Our job is to go through all the rows and there are two
 ways to do it: with :func:`box.space.space_object:pairs() <space_object.pairs>` or with
-:func:`index.iterator <index_object.pairs>`.
-We preferred ``pairs()`` because it is simpler.
+:code:`variable = select(...)` followed by
+:codenormal:`for i,`:codeitalic:`n`:codenormal:`,1 do` :codeitalic:`some-function`:codenormal:`(variable[i]) end`.
+We preferred ``pairs()`` for this example.
 
 **LINE 5: START THE MAIN LOOP.** Everything inside this ":code:`for`" loop will be
 repeated as long as there is another index key. A tuple is fetched and can be

doc/sphinx/book/connectors/__c.rst

@@ -140,9 +140,9 @@ the program passes the tnt_stream that was used for connection
 (:code:`tnt`) and the stream that was set up with tnt_object_format (:code:`tuple`).
 
 Function description: |br|
-:codenormal:`tnt_insert(struct tnt_stream *s, uint32_t space, struct tnt_stream *tuple)` |br|
-:codenormal:`tnt_replace(struct tnt_stream *s, uint32_t space, struct tnt_stream *tuple)` |br|
-:codenormal:`tnt_select(struct tnt_stream *s, uint32_t space, uint32_t index, uint32_t limit, uint32_t offset, uint8_t iterator, struct tnt_stream *key)` |br|
+:codenormal:`ssize_t tnt_insert(struct tnt_stream *s, uint32_t space, struct tnt_stream *tuple)` |br|
+:codenormal:`ssize_t tnt_replace(struct tnt_stream *s, uint32_t space, struct tnt_stream *tuple)` |br|
+:codenormal:`ssize_t tnt_select(struct tnt_stream *s, uint32_t space, uint32_t index, uint32_t limit, uint32_t offset, uint8_t iterator, struct tnt_stream *key)` |br|
 :codenormal:`ssize_t tnt_update(struct tnt_stream *s, uint32_t space, uint32_t index, struct tnt_stream *key, struct tnt_stream *ops)`
 
 .. _c_get_reply:
@@ -177,8 +177,8 @@ should be destroyed.
     tnt_stream_free(tnt);
 
 Function description: |br|
-:codenormal:`tnt_close(struct tnt_stream *s)` |br|
-:codenormal:`tnt_stream_free(struct tnt_stream *s)`
+:codenormal:`void tnt_close(struct tnt_stream *s)` |br|
+:codenormal:`void tnt_stream_free(struct tnt_stream *s)`
 
 The example program only shows one request and does not show all that's
 necessary for good practice. For that, see http://github.com/tarantool/tarantool-c.

doc/sphinx/book/connectors/__python.rst

@@ -22,7 +22,7 @@ check that the server is listening and that examples exists, as :ref:`described
 To run the program, say :code:`python example.py`. The program will connect
 to the server, will send the request, and will not throw an exception if
 all went well. If the tuple already exists, the program will throw
-:code:`DatabaseException(“Duplicate key exists in unique index”)`.
+:code:`tarantool.error.DatabaseError: (3, "Duplicate key exists in unique index 'primary' in space 'examples'")`.
 
 The example program only shows one request and does not show all that's
 necessary for good practice. For that, see http://github.com/tarantool/tarantool-python.