v3.7.2

Enhancements:

• gem sources --prepend and --append allow finer grained control of
  sources. Pull request
  #8901 by martinemde
• Improve gem sources --remove output. Pull request
  #8909 by
  deivid-rodriguez
• Make gem sources output more clear. Pull request
  #8938 by
  deivid-rodriguez
• Use IMDSv2 for S3 instance credentials. Pull request
  #7709 by
  folbricht-stripe
• Installs bundler 2.7.2 as a default gem.

Bug fixes:

• Fix "did you mean" suggestions for unknown commands. Pull request
  #8948 by
  deivid-rodriguez
• Fix trailing slashes not considered by gem sources --remove. Pull
  request #8939 by
  deivid-rodriguez