Gem::VersionOption#add_version_option

# File tmp/rubies/ruby-4.0.0/lib/rubygems/version_option.rb, line 52
def add_version_option(task = command, *wrap)
  Gem::OptionParser.accept Gem::Requirement do |value|
    Gem::Requirement.new(*value.split(/\s*,\s*/))
  end

  add_option("-v", "--version VERSION", Gem::Requirement,
             "Specify version of gem to #{task}", *wrap) do |value, options|
    # Allow handling for multiple --version operators
    if options[:version] && !options[:version].none?
      options[:version].concat([value])
    else
      options[:version] = value
    end

    explicit_prerelease_set = !options[:explicit_prerelease].nil?
    options[:explicit_prerelease] = false unless explicit_prerelease_set

    options[:prerelease] = value.prerelease? unless
      options[:explicit_prerelease]
  end
end