notes white-space is pre-line

src/scss/box.scss

@@ -87,6 +87,11 @@
                 overflow-x: auto;
             }
 
+            &.pre-line {
+                white-space: pre-line;
+                overflow-x: auto;
+            }
+
             .row-label, label {
                 font-size: $font-size-small;
                 display: block;