[docs] Update v3 migration guide for ExpansionPanel#expanded

This is related to PR #15368.
mui · Nov 28, 2019 · c3e0359 · c3e0359
1 parent d090429
commit c3e0359
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/docs/src/pages/guides/migration-v3/migration-v3.md b/docs/src/pages/guides/migration-v3/migration-v3.md
@@ -250,7 +250,7 @@ This change is explained in more detail in the [TypeScript guide](/guides/typesc
 ### ExpansionPanel
 
 - [ExpansionPanelActions] Rename the `action` CSS class to `spacing`.
-- [ExpansionPanel] Increase the CSS specificity of the `disabled` style rule.
+- [ExpansionPanel] Increase the CSS specificity of the `disabled` and `expanded` style rules.
 - [ExpansionPanel] Rename the `CollapseProps` prop to `TransitionProps`.
 
 ### List