assets/stylesheets/bootstrap/_button-group.scss in bootstrap-4.0.0 vs assets/stylesheets/bootstrap/_button-group.scss in bootstrap-4.1.0

@@ -74,11 +74,17 @@
 
 .dropdown-toggle-split {
   padding-right: $btn-padding-x * .75;
   padding-left: $btn-padding-x * .75;
 
-  &::after {
+  &::after,
+  .dropup &::after,
+  .dropright &::after {
     margin-left: 0;
+  }
+
+  .dropleft &::before {
+    margin-right: 0;
   }
 }
 
 .btn-sm + .dropdown-toggle-split {
   padding-right: $btn-padding-x-sm * .75;