Mixin docs!

diff --git a/scss/components/_button-group.scss b/scss/components/_button-group.scss
index 221e9be51d066d8deabcb515494a40c1c0e94d81..3982ff66444d41a485fa3526e28e7fc6647b5461 100644 (file)
--- a/scss/components/_button-group.scss
+++ b/scss/components/_button-group.scss
@@ -78,6 +78,7 @@ $buttongroup-radius-on-each: true !default;
 
 /// Creates a full-width button group, making each button equal width.
 /// @param {String} $selector [$buttongroup-child-selector] - Selector for the buttons inside a button group.
+/// @param {Number} $spacing [$buttongroup-spacing] - Spacing between buttons in a button group.
 @mixin button-group-expand(
   $selector: $buttongroup-child-selector,
   $spacing: $buttongroup-spacing,