Release note This is a follow-up release for Ruby 4.0.0 with documentation update based on Ruby 4.0.0, and bugfixes related to set/pathname library loading. Pull Requests Merge pull request #2777 from ksss/pathname-ext (#2786) Ruby 4.0.0 backports (#2785) [Backport] Fix subtraction of civar (#2783) [Backport] Update ruby to 4.0 (#2778)
