 list</span>, string)</span> <span class="xref-unresolved">Stdlib</span>.result</span></span></code></div><div class="spec-doc"><p>Same as <a href="#val-lines_joined"><code>lines_joined</code></a> but reads stdout and stderr as a separate strings streams, returning a pair of string lists wrapped in the ouput type. This function uses asynchronous I/O internally, so the optional <code>sleep</code> parameter is provided as a means to pause briefly if output is expected to be slow to avoid pegging the CPU with 