[ruby/rdoc] Move dev dependency of gettext to Gemfile
https://github.com/ruby/rdoc/commit/a177377b6f
[ruby/rdoc] Move dev dependency of gettext to Gemfile
https://github.com/ruby/rdoc/commit/a177377b6f