abbrev has been bundled as a gem, and will be removed from the stdlib from ruby 3.4.0
under 3.3.0, this will remove this warning
warning: abbrev was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add abbrev to your Gemfile or gemspec. Also contact author of highline-2.1.0 to add abbrev into its gemspec.
abbrev has been bundled as a gem, and will be removed from the stdlib from ruby 3.4.0
under 3.3.0, this will remove this warning