eqv = Fmake_char_table (Qcase_table, Qnil);
map_char_table (set_identity, Qnil, canon, eqv);
map_char_table (shuffle, Qnil, canon, eqv);
eqv = Fmake_char_table (Qcase_table, Qnil);
map_char_table (set_identity, Qnil, canon, eqv);
map_char_table (shuffle, Qnil, canon, eqv);