inline break not working


i am trying to add in CSS a line break after the title of the calendar entry that is provided by the Simple Calendar widget on Wordpress.

The page is:

Inspecting the element "festa alternativa sants" in Opera, i see that the class name is "simcal-event-title".

In Wordpress's Additional CSS, i have added:

.simcal-event-title:after {
content: '/a;
white-space: pre;

However, that does not add a line break.

Any suggestions?


Line breaks

I'm very new in CSS.

Before posting here i searched but things were too mixed and confusing for me to understand so starting a new topic.

I want to know how to add line break after where i mentioned in code.


.container {
  margin-left: auto;
  margin-right: auto;
  width: 13.75em;
.container .box {
  border: 1px solid black;
  background-color: gray;
  color: black;
  float: left;
  line-height: 1.5;
  margin: 0.5em;
  text-align: center;
  height: 1.5em;
  width: 1.5em;


<div class="container">

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