Migration docs: Make Buttons and Button Group sections adjacent

[ci skip]

diff --git a/docs/migration.md b/docs/migration.md
index 82f8138735da94a0a7aad9ae6300f96c32f0b56c..361750da46524bc950c3d0bb68645c879f46ae74 100644 (file)
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -89,14 +89,14 @@ New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with
 - The [stateful button](http://getbootstrap.com/javascript/#buttons-methods) feature of the `button.js` jQuery plugin has been dropped. This includes the `$().button(string)` and `$().button('reset')` methods. We advise using a tiny bit of custom JavaScript instead, which will have the benefit of behaving exactly the way you want it to.
   - Note that the other features of the plugin (button checkboxes, button radios, single-toggle buttons) have been retained in v4.
 
-### Grid system
-
-- Added a new `~480px` grid breakpoint, meaning there are now five total tiers.
-
 ### Button group
 
 - Dropped the `.btn-group-xs` class entirely.
 
+### Grid system
+
+- Added a new `~480px` grid breakpoint, meaning there are now five total tiers.
+
 ### Navs
 
 - Dropped nearly all `>` selectors for simpler styling via un-nested classes.