diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index e39fa68b26..e5740e30c6 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -26,9 +26,11 @@
 
 *   Change `asset_path` to use File.join to create proper paths:
 
+    Before:
+
         https://some.host.com//assets/some.js
 
-    becomes
+    After:
 
         https://some.host.com/assets/some.js
 
diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
index 68cc874ca3..b94558b65c 100644
--- a/activemodel/CHANGELOG.md
+++ b/activemodel/CHANGELOG.md
@@ -1,4 +1,4 @@
-*   Add plural and singular form for length validator's default messages
+*   Add plural and singular form for length validator's default messages.
 
     *Abd ar-Rahman Hamid*
 
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 3474a983e1..5647204859 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -46,13 +46,13 @@
 *   Fix `PostgreSQLAdapter::OID::Float#type_cast` to convert Infinity and
     NaN PostgreSQL values into a native Ruby `Float::INFINITY` and `Float::NAN`
 
-    Example:
+    Before:
 
-        # Before
         Point.create(value: 1.0/0)
         Point.last.value # => 0.0
 
-        # After
+    After:
+
         Point.create(value: 1.0/0)
         Point.last.value # => Infinity
 
@@ -78,7 +78,7 @@
     HABTM should fall back to using the normal CollectionAssociation's size
     calculation if the collection is not cached or loaded.
 
-    Fixes #14913 and #14914.
+    Fixes #14913, #14914.
 
     *Fred Wu*
 
@@ -280,7 +280,7 @@
 
 *   Auto-generate stable fixture UUIDs on PostgreSQL.
 
-    Fixes: #11524
+    Fixes #11524.
 
     *Roderick van Domburg*
 
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 77224a208a..866a5a958d 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -7,7 +7,7 @@
     convert a value that is an `ActiveSupport::SafeBuffer` introduced
     in 2da9d67.
 
-    For more info see #15064.
+    See #15064.
 
     *Mark J. Titorenko*