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        parameter value contains non-ASCII characters it can be specified as a
        three-tuple of (charset, language, value), in which case it will be
        encoded according to RFC2231 rules.  Otherwise it will be encoded using
        the utf-8 charset and a language of ''.

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        the parameter the value is the empty string.  The value is as
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        If your application doesn't care whether the parameter was RFC 2231
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            param = email.utils.collapse_rfc2231_value(rawparam)

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        value will be appended as per RFC 2045.

        An alternate header can specified in the header argument, and all
        parameters will be quoted as necessary unless requote is False.

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