[ruby/reline] Prevent a warning for warning: literal string will be frozen in the future (https://github.com/ruby/reline/pull/744)
warning: literal string will be frozen in the future
https://github.com/ruby/reline/commit/69c95c8b6a
[ruby/reline] Prevent a warning for
warning: literal string will be frozen in the future(https://github.com/ruby/reline/pull/744)
https://github.com/ruby/reline/commit/69c95c8b6a