* eword-decode.el (eword-after-encoded-word-regexp): New constant.

* eword-decode.el (eword-after-encoded-word-regexp): New constant.
eword-encoded-text-in-phrase-regexp: New constant.
eword-encoded-word-in-phrase-regexp: New constant.
eword-after-encoded-word-in-phrase-regexp: New constant.
eword-encoded-text-in-comment-regexp: New constant.
eword-encoded-word-in-comment-regexp: New constant.
eword-after-encoded-word-in-comment-regexp: New constant.
eword-encoded-text-in-quoted-string-regexp: New constant.
eword-encoded-word-in-quoted-string-regexp: New constant.
eword-after-encoded-word-in-quoted-string-regexp: New constant.
eword-decode-sticked-encoded-word: Update DOC-STRING.
eword-decode-quoted-encoded-word: Update DOC-STRING.
eword-decode-first-encoded-words: Add argument eword-regexp.
eword-decode-comment-string: Use `eword-encoded-word-in-comment-regexp'
and `eword-after-encoded-word-in-comment-regexp'.
eword-decode-quoted-string : Use
`eword-encoded-word-in-quoted-string-regexp' and
`eword-after-encoded-word-in-quoted-string-regexp'.
eword-decode-unstructured-string: Use `eword-encoded-word-regexp' and
`eword-after-encoded-word-regexp'.
eword-analyze-encoded-word: Use `eword-encoded-word-in-phrase-regexp'
and `eword-after-encoded-word-in-phrase-regexp'
eword-lexical-analyze: Add `default-mime-charset' and `must-unfold' to
key of cache.