240,251c240,261
<    accessible within the rest of the regular expression via the symbolic group
<    name *name*.  Group names must be valid Python identifiers, and each group
<    name must be defined only once within a regular expression.  A symbolic group
<    is also a numbered group, just as if the group were not named.  So the group
<    named ``id`` in the example below can also be referenced as the numbered group
<    ``1``.
< 
<    For example, if the pattern is ``(?P<id>[a-zA-Z_]\w*)``, the group can be
<    referenced by its name in arguments to methods of match objects, such as
<    ``m.group('id')`` or ``m.end('id')``, and also by name in the regular
<    expression itself (using ``(?P=id)``) and replacement text given to
<    ``.sub()`` (using ``\g<id>``).
---
>    accessible via the symbolic group name *name*.  Group names
>    must be valid Python identifiers, and each group name must be defined only
>    once within a regular expression.  A symbolic group is also a numbered group,
>    just as if the group were not named.  
> 
>    Named groups can be referenced in three processing contexts.  If the pattern
>    is ``r'(?P<quote>[\042\047]).*?(?P=quote)'`` and a successful match object is
>    ``MO``:
> 
> +---------------------------------------+--------------------------------------+
> | Context of Reference to Group "quote" | Ways to Reference It                 |
> +=======================================+======================================+
> | in the same pattern itself            | ``(?P=quote)`` (as shown)            |
> |                                       | ``\1``                               |
> +---------------------------------------+--------------------------------------+
> | when processing match object ``MO``   | ``MO.group( 'quote')``               |
> |                                       | ``MO.end( 'quote')`` (etc.)          |
> +---------------------------------------+--------------------------------------+
> | in a string passed to the ``repl``    | ``\g<quote>``                        |
> | argument of ``re.sub()``              | ``\g<1>``                            |
> |                                       | ``\1``                               |
> +---------------------------------------+--------------------------------------+
254c264,265
<    Matches whatever text was matched by the earlier group named *name*.
---
>    A backreference to a named group; it matches whatever text was matched by the
>    earlier group named *name*.
645c656
<    In addition to character escapes and backreferences as described above,
---
>    In string-type *repl* arguments, in addition to the character escapes and backreferences described above,