ormatter, unit, <span class="type-var">'a</span>)</span> <a href="../../IStdlib/IStd/index.html#type-format4">IStdlib.IStd.format4</a></span> <span class="arrow">&#45;&gt;</span></span>
  <span class="type-var">'b</span></span></code></div><div class="spec-doc"><p>Unconditionally execute <code>f</code> so that all logs written inside (if any) are written with indentation, using the title format provided.</p><p><code>pp_result</code>, if provided, will make the result of a call to be printed as well (useful 