style(*): resolve stylelint error, close #128

Author: Scrum

src/pss/utils/_mixins.pss

@@ -1,12 +1,15 @@
 .box-left {
   float: left;
 }
+
 .box-right {
   float: right;
 }
+
 .box-relative {
   position: relative;
 }
+
 .box-absolute {
   position: absolute;
 }

src/pss/utils/helpers/_boxs.pss

@@ -21,6 +21,7 @@
       padding-right: initial;
     }
   }
+
   @if ($position == 'h') {
     .reset-offset-$(position) {
       margin-top: initial;