- "Writes the current buffer to maildir destdir. If mark-seen is
-non-nil, it will write it to cur/, and mark it as read. It should
-return t if successful, and nil otherwise."
+ "Write the current buffer to maildir destdir.
+
+If mark-seen is non-nil, then write it to \"cur/\", and mark it
+as read, otherwise write it to \"new/\". Return t if successful,
+and nil otherwise."