add_spec

# File lib/rubygems/specification.rb, line 879
  def self.add_spec(spec)
    warn "Gem::Specification.add_spec is deprecated and will be removed in RubyGems 3.0" unless Gem::Deprecate.skip
    # TODO: find all extraneous adds
    # puts
    # p :add_spec => [spec.full_name, caller.reject { |s| s =~ /minitest/ }]

    # TODO: flush the rest of the crap from the tests
    # raise "no dupes #{spec.full_name} in #{all_names.inspect}" if
    #   _all.include? spec

    raise "nil spec!" unless spec # TODO: remove once we're happy with tests

    return if _all.include? spec

    _all << spec
    stubs << spec
    (@@stubs_by_name[spec.name] ||= []) << spec
    sort_by!(@@stubs_by_name[spec.name]) { |s| s.version }
    _resort!(_all)
    _resort!(stubs)
  end