Changelog for ruby2.1-rubygem-optimist-3.0.0-4.7.x86_64.rpm :

* Sat Jan 19 2019 Marcus Rueckert - rb_build_ruby_abi needs to be rb_build_ruby_abis
* Fri Jan 18 2019 Marcus Rueckert - use rb_build_ruby_abi instead of rb_default_ruby_abi
* Thu Sep 20 2018 Marcus Rueckert - initial package