Fix the CHANGELOG headers [ci skip]

actionmailer/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Rails 3.2.13 (unreleased) ##
+
+*   No changes.
+
+
 ## Rails 3.2.12 (Feb 11, 2013) ##
 
 *   No changes.

actionpack/CHANGELOG.md

@@ -1,3 +1,5 @@
+## Rails 3.2.13 (unreleased) ##
+
 *   Fix `assert_template` with `render :stream => true`.
     Fix #1743.
     Backport #5288.

activemodel/CHANGELOG.md

@@ -1,3 +1,5 @@
+## Rails 3.2.13 (unreleased) ##
+
 *   Specify type of singular association during serialization *Steve Klabnik*
 
 

activerecord/CHANGELOG.md

@@ -1,3 +1,5 @@
+## Rails 3.2.13 (unreleased) ##
+
 *   Preloading `has_many :through` associations with conditions won't
     cache the `:through` association. This will prevent invalid
     subsets to be cached.

activeresource/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Rails 3.2.13 (unreleased) ##
+
+*   No changes.
+
+
 ## Rails 3.2.12 (Feb 11, 2013) ##
 
 *   No changes.

activesupport/CHANGELOG.md

@@ -1,3 +1,5 @@
+## Rails 3.2.13 (unreleased) ##
+
 *   Fix DateTime comparison with DateTime::Infinity object.
 
     *Dan Kubb*

railties/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Rails 3.2.13 (unreleased) ##
+
+*   No changes.
+
+
 ## Rails 3.2.12 (Feb 11, 2013) ##
 
 *   No changes.