Gem::QueryUtils#version_label

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/query_utils.rb, line 277
def version_label(version, specs)
  out = version.to_s
  return out unless options[:domain] == :local

  default = specs.any? do |s|
    !s.is_a?(Gem::Source) && s.version == version && s.default_gem?
  end
  default ? "default: #{out}" : out
end