Package: rubygem-rspec-core

"rubygem-rspec-core" package binaries on CentOS:

/usr/bin/autospec2 /usr/bin/rspec /usr/lib/ruby/gems/1.8/gems/rspec-core-2.6.4/bin/autospec /usr/lib/ruby/gems/1.8/gems/rspec-core-2.6.4/bin/rspec

You may install this package on CentOS with yum install rubygem-rspec-core