Update documentation.

Author: serhiy-storchaka

Doc/library/binascii.rst

@@ -283,42 +283,62 @@ The :mod:`!binascii` module defines the following functions:
 
    The Base 64 alphabet according to :rfc:`4648`.
 
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 .. data:: URLSAFE_BASE64_ALPHABET
 
    The "URL and filename safe" Base 64 alphabet according to :rfc:`4648`.
 
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 .. data:: CRYPT_ALPHABET
 
    The Base 64 alphabet used in the :manpage:`crypt(3)` routine and in the GEDCOM format.
 
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 .. data:: BCRYPT_ALPHABET
 
    The Base 64 alphabet used in the ``bcrypt`` hashing function.
 
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 .. data:: UU_ALPHABET
 
-   The Uuencoding alphabet.
+   The uuencoding alphabet.
+
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 .. data:: XX_ALPHABET
 
-   The Xxencoding alphabet.
+   The xxencoding alphabet.
+
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 .. data:: BINHEX_ALPHABET
 
    The Base 64 alphabet used in BinHex 4 (HQX) within the classic Mac OS.
 
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 .. data:: BASE85_ALPHABET
 
    The Base85 alphabet.
 
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 .. data:: ASCII85_ALPHABET
 
    The Ascii85 alphabet.
 
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 .. data:: Z85_ALPHABET
 
    The `Z85 <https://rfc.zeromq.org/spec/32/>`_ alphabet.
 
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+
 
 .. seealso::