Bootstrap v4 Beta 1 - no 'push' or 'pull' classes #23464
Description
There are no 'push' or 'pull' classes, within Bootstrap, on the contrary to the documentation.
There should be classes such as 'push-md-6' and 'pull-md-6', but they are completely omitted from the implementation, despite being specified in the documentation:
Test case:
<nav class="col-12 navbar navbar-expand-md">
<ul class="col-md-6 push-md-6 navbar-nav justify-content-end">
<li class="nav-item nav-link">Should be far right</li>
</ul>
<ul class="col-md-6 pull-md-6 navbar-nav justify-content-start">
<li class="nav-item nav-link">Should be far left</li>
</ul>
</nav>