class RSpec::Core::Bisect::Runner

def command_for(locations)
  parts = []
  parts << RUBY << load_path
  parts << open3_safe_escape(RSpec::Core.path_to_executable)
  parts << "--format"   << "bisect"
  parts << "--drb-port" << @server.drb_port
  parts.concat reusable_cli_options
  parts.concat locations.map { |l| open3_safe_escape(l) }
  parts.join(" ")
end