Indent $color variable list

_sass/basically-basic/_icons.scss

@@ -12,27 +12,28 @@
   vertical-align: middle;
   fill: currentColor;
 
-  $icons:
-  (bitbucket, #205081),
-  (codepen, #000),
-  (dribbble, #ea4c89),
-  (email, #000),
-  (facebook, #3b5998),
-  (flickr, #0063dc),
-  (github, #181717),
-  (gitlab, #e24329),
-  (googleplus, #dc4e41),
-  (instagram, #e4405f),
-  (lastfm, #d51007),
-  (linkedin, #0077b5),
-  (pinterest, #bd081c),
-  (rss, #ffa500),
-  (soundcloud, #ff3300),
-  (stackoverflow, #fe7a16),
-  (tumblr, #36465d),
-  (twitter, #1da1f2),
-  (xing, #005a5f),
-  (youtube, #cd201f);
+  $icons: (
+    (bitbucket, #205081),
+    (codepen, #000),
+    (dribbble, #ea4c89),
+    (email, #000),
+    (facebook, #3b5998),
+    (flickr, #0063dc),
+    (github, #181717),
+    (gitlab, #e24329),
+    (googleplus, #dc4e41),
+    (instagram, #e4405f),
+    (lastfm, #d51007),
+    (linkedin, #0077b5),
+    (pinterest, #bd081c),
+    (rss, #ffa500),
+    (soundcloud, #ff3300),
+    (stackoverflow, #fe7a16),
+    (tumblr, #36465d),
+    (twitter, #1da1f2),
+    (xing, #005a5f),
+    (youtube, #cd201f)
+  );
 
   @each $icon, $color in $icons {
     &--#{$icon} {