I would like to add a command (in a form of a button or a drop-down format menu item) to wrap some (selected) text into html tags. Let the text in question be a date (January 1st, 2019) and the result should be (in html code):
<li><span class="date">January 1st, 2019</span></li>
Is there is a cookbook or manual for such modifications, please? I haven't found any so far.