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DOC: re discourage single char class #24123

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DOC: re discourage single char class #24123

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5 changes: 2 additions & 3 deletions Doc/library/re.rst
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Expand Up @@ -263,8 +263,7 @@ The special characters are:
right. When one pattern completely matches, that branch is accepted. This means
that once *A* matches, *B* will not be tested further, even if it would
produce a longer overall match. In other words, the ``'|'`` operator is never
greedy. To match a literal ``'|'``, use ``\|``, or enclose it inside a
character class, as in ``[|]``.
greedy. To match a literal ``'|'``, use ``\|``.

.. index::
single: () (parentheses); in regular expressions
Expand All @@ -274,7 +273,7 @@ The special characters are:
start and end of a group; the contents of a group can be retrieved after a match
has been performed, and can be matched later in the string with the ``\number``
special sequence, described below. To match the literals ``'('`` or ``')'``,
use ``\(`` or ``\)``, or enclose them inside a character class: ``[(]``, ``[)]``.
use ``\(`` or ``\)``.

.. index:: single: (?; in regular expressions

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