#1865: document syntax for bytes literals.
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@ -426,6 +426,7 @@ String literals are described by the following lexical definitions:
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.. productionlist::
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stringliteral: [`stringprefix`](`shortstring` | `longstring`)
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stringprefix: "r" | "u" | "ur" | "R" | "U" | "UR" | "Ur" | "uR"
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: | "b" | "B" | "br" | "Br" | "bR" | "BR"
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shortstring: "'" `shortstringitem`* "'" | '"' `shortstringitem`* '"'
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longstring: "'''" `longstringitem`* "'''"
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: | '"""' `longstringitem`* '"""'
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@ -458,8 +459,10 @@ different rules for interpreting backslash escape sequences. A prefix of
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``'u'`` or ``'U'`` makes the string a Unicode string. Unicode strings use the
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Unicode character set as defined by the Unicode Consortium and ISO 10646. Some
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additional escape sequences, described below, are available in Unicode strings.
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The two prefix characters may be combined; in this case, ``'u'`` must appear
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before ``'r'``.
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A prefix of ``'b'`` or ``'B'`` is ignored in Python 2; it indicates that the
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literal should become a bytes literal in Python 3 (e.g. when code is
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automatically converted with 2to3). A ``'u'`` or ``'b'`` prefix may be followed
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by an ``'r'`` prefix.
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In triple-quoted strings, unescaped newlines and quotes are allowed (and are
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retained), except that three unescaped quotes in a row terminate the string. (A
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