From ee7fb923d484f1dfe19e10210e7bde0a753ff2f5 Mon Sep 17 00:00:00 2001
From: Jan Bussieck <jan.bussieck@gmail.com>
Date: Fri, 22 Dec 2017 22:01:49 +0100
Subject: [PATCH] [docs] Add mention of removal of HWIA interface from
 `AC:Parameters` [ci skip]

---
 guides/source/5_1_release_notes.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/guides/source/5_1_release_notes.md b/guides/source/5_1_release_notes.md
index 6b9a950a42b1a..852d04b1f632f 100644
--- a/guides/source/5_1_release_notes.md
+++ b/guides/source/5_1_release_notes.md
@@ -355,6 +355,9 @@ Please refer to the [Changelog][action-pack] for detailed changes.
     ([Commit](https://github.com/rails/rails/commit/79a5ea9eadb4d43b62afacedc0706cbe88c54496), 
     [Commit](https://github.com/rails/rails/commit/57e1c99a280bdc1b324936a690350320a1cd8111))
 
+*   Removed deprecated support for calling `HashWithIndifferentAccess` methods on `ActionController::Parameters`.
+    ([Commit](https://github.com/rails/rails/pull/26746/commits/7093ceb480ad6a0a91b511832dad4c6a86981b93))
+
 ### Deprecations
 
 *   Deprecated `config.action_controller.raise_on_unfiltered_parameters`.