-(push '((:iso-8859-10 :|iso-8859-10| :latin-6 :|latin-6|)
- iso-8859-10->string-aref string->iso-8859-10)
- *external-format-functions*)
+(add-external-format-funs '(:iso-8859-10 :|iso-8859-10| :latin-6 :|latin-6|)
+ '(iso-8859-10->string-aref string->iso-8859-10))