mail-decode-encoded-word-region
mail-decode-encoded-word-region is an alias for `rfc2047-decode-region' in `mail-parse.el
'.
(mail-decode-encoded-word-region START END &optional ADDRESS-MIME)
Decode MIME-encoded words in region between START and END.
If ADDRESS-MIME is non-nil, strip backslashes which precede characters
other than `"' and `\' in quoted strings.