Merge pull request #17456 from davidjb/v4-img-responsive

Document migration for img-responsive to img-fluid

docs/components/buttons.md

@@ -66,6 +66,7 @@ In need of a button, but not the hefty background colors they bring? Replace the
 <button type="button" class="btn btn-primary-outline">Primary</button>
 <button type="button" class="btn btn-secondary-outline">Secondary</button>
 <button type="button" class="btn btn-success-outline">Success</button>
+<button type="button" class="btn btn-info-outline">Info</button>
 <button type="button" class="btn btn-warning-outline">Warning</button>
 <button type="button" class="btn btn-danger-outline">Danger</button>
 {% endexample %}

docs/migration.md

@@ -54,6 +54,10 @@ New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with
 - `.dl-horizontal` now requires grid classes, increasing flexbility in column widths.
 - Custom `<blockquote>` styling has moved to classes—`.blockquote` and the `.blockquote-reverse` modifier.
 
+### Images
+
+- Renamed `.img-responsive` to `.img-fluid`.
+
 ### Tables
 
 - Nearly all instances of the `>` selector have been removed, meaning nested tables will now automatically inherit styles from their parents. This greatly simplifies our selectors and potential customizations.