@@ -139,7 +139,8 @@ New to Bootstrap 4 is the [Reboot]({{ site.baseurl }}/docs/{{ site.docs_version
### Grid system
- Added a new `576px` grid breakpoint as `sm`, meaning there are now five total tiers (`xs`, `sm`, `md`, `lg`, and `xl`).
- Renamed the responsive grid modifier classes from `.col-{breakpoint}-{modifier}-{size}` to `.{modifier}-{breakpoint}-{size}` for simpler grid classes. For example, instead of `.col-md-3.col-md-push-9` it's `.col-md-3.push-md-9`.
- Renamed the responsive grid modifier classes from `.col-{breakpoint}-{modifier}-{size}` to `.{modifier}-{breakpoint}-{size}` for simpler grid classes.
- Dropped push and pull modifier classes for the new flexbox-powered `order` classes. For example, instead of `.col-8.push-4` and `.col-4.pull-8`, you'd use `.col-8.order-2` and `.col-4.order-1`.
- Added flexbox utility classes for grid system and components.
