Such an object is used to store an ordinary "require" as well as a "require else" clause.
Furthermore, a E_REQUIRE object can also be used to store all the inherited require assertions of some
Append in str the Eiffel coding of the character (Table in chapter 25 of ETL, page 423).%%%%%%%%
When the % letter notation exists, it is returned in priority: '%N' gives "%N", '%T'
gives "%T", etc.
When % letter notation does not exists (not in the ETL table), numbered coding is
used ("%/1/", "%/2/" etc).