Add a line break between inline elements

It's a common scenario where we want to split a heading into multiple lines. For example, the heading is displayed continuously on a big screen. But on a small screen, it should breaks into different parts.

Without using the `br` tag, we can construct the heading from various inline `span` elements.

<h2>
    <span class="primary">Tip, tricks, best practices</span>
    <span>of front-end development</span>
</h2>

By using the `::after` pseudo element, we are able to add a line break after the first inline element:

.primary::after {
    content: '\A';
    white-space: pre;
}

Where `\A` represents the line break character.