ruby/rubygems bundler-v2.3.9

on GitHub

Enhancements:

• Add newline to validate_platforms! message when platform is missing #5353
• Suggest quicker bundle add for installation in README.md generated by bundle gem #5337
• Make --strict flag of update and outdated commands consistent #5379

Bug fixes:

• Fix regression when activating gem executables caused by Bundler monkey patches to RubyGems #5386