Use sass syntax

assets/sass/components/_meetups.sass

@@ -1,5 +1,5 @@
 .meetups
-    @include clearfix
+    +clearfix
 
     ul
         list-style: none

assets/sass/components/_testimonials.sass

@@ -1,5 +1,5 @@
 .testimonial
-    @include clearfix
+    +clearfix
     margin-bottom: 10px
 
     .testimonial__image
@@ -9,6 +9,6 @@
         margin: 0 0 10px 10px
         width: 75px
 
-        @include breakpoint($screen-sm)
+        +breakpoint($screen-sm)
             height: 90px
             width: 90px

assets/sass/pages/_blog-list.sass

@@ -5,7 +5,7 @@
         padding-left: 0
 
     .post
-        @include clearfix
+        +clearfix
         border-bottom: 1px solid #CCC
         margin-bottom: 1em
         padding-bottom: 2em

assets/sass/pages/_blog-post.sass

@@ -1,5 +1,5 @@
 .about-author
-    @include clearfix
+    +clearfix
 
     img
         float: left

assets/sass/pages/_experience.sass

@@ -1,5 +1,5 @@
 .experience
-    @include clearfix
+    +clearfix
 
     .experience__logo
         @extend .pull-right