shortened console.ac description

doc/sphinx/reference/console.rst

@@ -115,23 +115,7 @@ host/port.
 
 .. function:: ac([true|false])
 
-   Set the auto-completion flag.
-   If auto-completion is `true`, and
-   the user is :ref:`using tarantool as a client <using-tarantool-as-a-client>`,
-   then hitting the TAB
-   key will have a special effect. Suppose that, so far,
-   the user has typed 'ap'. |br|
-   * If there is a single variable or function name
-   which begins with 'ap', such as 'apple', then auto-completion occurs,
-   the full name 'apple' appears on the screen. |br|
-   * If there are two variables or function names
-   which begin with 'ap', such as 'apple' and 'application',
-   then auto-completion occurs for the letters that are
-   in common, and the terminal beeps. |br|
-   * If there are no variables or function names
-   which begin with 'ap', then the terminal beeps.
-
+   Set the auto-completion flag. If auto-completion is `true`,
+   and the user is using tarantool as a client, then hitting
+   the TAB key may cause tarantool to complete a word automatically.
    The default auto-completion value is `true`.
-   When auto-completion is true, users can still put tabs
-   inside strings with the Lua escape sequence: \\t.
-