zurb-foundation-5/doc/includes/button_group/examples_button_group_variables.html

Foundation 5 for npm (no code modification from original repo)

{{#markdown}}
```scss
$include-html-button-classes: $include-html-classes;

// Sets the margin for the right side by default, and the left margin if right-to-left direction is used
$button-bar-margin-opposite: rem-calc(10);
$button-group-border-width: 1px;
```
{{/markdown}}