Changes:

• Include the gem's source in the gem install error message when available (@papanikge)
• Remove unnecessary executable bit from gem template (@voxik)
• Dont add the timestamp comment with gems added to the Gemfile via bundle add (#6193, @cpgo)
• Improve yanked gem error message (@alyssais)
• Use Bundler.rubygems.inflate instead of the Gem::Util method directly (@segiddins)
• Remove unused instance variable (@segiddins)

Bugfixes:

• Only trap INT signal and have Ruby's signal default handler be invoked (@shayonj)
• Fix warning about the use of __FILE__ in RubyGems integration testing (@MSP-Greg)
• Skip the outdated bundler check when MD5 is not available (#6032, @segiddins)
• Fallback to the original error if the friendly message raises (@segiddins)
• Rename Bundler.frozen? to avoid Object method conflict (#6252, @segiddins)
• Ensure the bindir exists before installing gems (@segiddins)
• Handle gzip corruption errors in the compact index client (#6261, @colby-swandale)
• Check if the current directory is writeable when writing files in bundle gem (#6219, @nilsding)
• Fix hang when gemspec has incompatible encoding (@deivid-rodriguez)
• Gracefully handle when the lockfile is missing spec entries for the current platform (#6079, @segiddins)
• Use Gem::Util.inflate instead of Gem.inflate (@hsbt)
• Update binstub generator to use new ERB.new arity in Ruby 2.6 (@koic)
• Fix source_location call in rubygems integration (@MSP-Greg)
• Use filesystem_access when copying files in Compact Index Updater (#6289, @segiddins)
• Fail gracefully when resetting git gems to the given revision fails (#6324, @segiddins)
• Handle exceptions that do not have a backtrace (#6342, @nesaulov)
• Check if stderr was closed before writing to it (@shime)
• Handle updating a specific gem for a non-local platform (#6350, @greysteil)
• Bump the bundle_binstub check-length to 300 characters (@tduffield)
• Fix specifying alterntive Lockfile with bundle lock when default gemfile is present (#6460, @agrim123)
• Allow installing dependencies when the path is set to . (#6475, @segiddins)
• Support Bundler installing on a readonly filesystem without a home directory (#6461, @grosser)
• Filter git uri credentials in source description (@segiddins)

Documentation:

• Correct typos in bundle binstubs man page (@erikj, @samueloph)
• Update links in bundle gem command documentation to use https (@KrauseFx)
• Fix broken links between bundler man pages (@segiddins)
• Add man page for the bundle doctor command (#6243, @nholden)
• Document # frozen_string_literal in bundle init Gemfile (@315tky)
• Explain the gemspec files attribute in bundle gem template and print a link to bundler.io guides when running bundle gem (#6246, @nesaulov)
• Small copy tweaks & removed redundant phrasing in the bundler man page (@rubymorillo)
• Improve the documentation of the settings load order in Bundler (@rubymorillo)
• Added license info to main README (@rubymorillo)  - Document parameters and return value of Injector#inject (@tobias-grasse)