untabified
diff --git a/py/objlist.c b/py/objlist.c
index b488a19..e3596a5 100644
--- a/py/objlist.c
+++ b/py/objlist.c
@@ -46,18 +46,18 @@
         }
         case RT_BINARY_OP_ADD:
         {
-	    if (!MP_OBJ_IS_TYPE(rhs, &list_type)) {
-		return NULL;
-	    }
-	    mp_obj_list_t *p = rhs;
-	    mp_obj_list_t *s = list_new(o->len + p->len);
-	    for (int i = 0; i < o->len; i++) {
-		s->items[i] = o->items[i];
-	    }
-	    for (int i = 0; i < p->len; i++) {
-		s->items[i+o->len] = p->items[i];
-	    }
-	    return s;
+            if (!MP_OBJ_IS_TYPE(rhs, &list_type)) {
+                return NULL;
+            }
+            mp_obj_list_t *p = rhs;
+            mp_obj_list_t *s = list_new(o->len + p->len);
+            for (int i = 0; i < o->len; i++) {
+                s->items[i] = o->items[i];
+            }
+            for (int i = 0; i < p->len; i++) {
+                s->items[i+o->len] = p->items[i];
+            }
+            return s;
         }
         default:
             // op not supported