Changes:

• Fixes for Bundler integration with ruby-src (#6941, #6973, #6977, #6315, #7061)
• Use __dir__ instead of __FILE__ when generating a gem with bundle gem (#6503)
• Use https on externals links in the Bundler gemspec (#6721)
• Removed duplicate gem names from the suggested did you mean list for gem typos (#6739)
• Removed Ruby 1.x compatibility code (#6764, #6806)
• Fixed an issue where bundle remove would crash with certain Gemfiles (#6768)
• Fixed indentation in the Bundler executable template (#6773)
• Fixed an issue where plugins could register for the same Bundler hook multiple times (#6775)
• Changed the "multiple sources" message in bundle install to be a warning instead of an error (#6790)
• Fixed a bug where path gems would break when using only_update_to_newer_versions (#6774)
• Fixed a bug where installing plugins with the --delpoyment setting would fail (#6805)
• Fixed an issue where bundle update couldn't update & install a gem when no_install was set (a bundle package config) (#7078)
• Fixed an issue where users could not run bundle exec on default gems (#6963)
• Updated vendor libraries to their latest version (#7076, #7068)
• Fixed an issue where the github source was not using https by default that we mentioned in the 2.0 release (#7182)
• Fixed an issue where rake release was not outputting the message to users asking for a 2fa token (#7199)

Documentation:

• Fix incorrect documented BUNDLE_PATH_RELATIVE_TO_CWD env var (#6751)
• Update URLs in Bundler's documentation to use https (#6935)