(defun wl-draft-remove-text-plain-tag ()
"Remove text/plain tag of mime-edit."
- (when (string= (mime-create-tag "text" "plain")
+ (when (string= (mime-make-text-tag)
(buffer-substring-no-properties (point-at-bol)(point-at-eol)))
(delete-region (point-at-bol)(1+ (point-at-eol)))))