(defun mime-preview-original-major-mode (&optional recursive)
"Return major-mode of original buffer.
-If a current buffer has mime-mother-buffer, return original major-mode
-of the mother-buffer."
+If optional argument RECURSIVE is non-nil and current buffer has
+mime-mother-buffer, it returns original major-mode of the
+mother-buffer."
(if (and recursive mime-mother-buffer)
(save-excursion
(set-buffer mime-mother-buffer)