class Gem::Specification

def _dump_with_rdoc(limit)
  dmp = _dump_without_rdoc(limit)
  dmp[15] = @has_rdoc if dmp[15] == true
  dmp
end

def has_rdoc?
  (@has_rdoc ||= true) && @has_rdoc != 'yard'
end

def has_yardoc
  @has_rdoc == 'yard'
end

def has_yardoc=(value)
  @has_rdoc = value ? 'yard' : false
end