[ruby/prism] Add IBM864 encoding
Fixes https://github.com/ruby/prism/pull/1868 Related #1843
https://github.com/ruby/prism/commit/abc136dfc9
[ruby/prism] Add IBM864 encoding
Fixes https://github.com/ruby/prism/pull/1868
Related #1843
https://github.com/ruby/prism/commit/abc136dfc9