1 files changed, 182 insertions, 1 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index d9f23c55ba..83ff80e31a 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,184 @@
+*   Use `Hash#compact` and `Hash#compact!` from Ruby 2.4. Old Ruby versions
+    will continue to get these methods from Active Support as before.
+
+    *Prathamesh Sonpatki*
+
+*   Fix `ActiveSupport::TimeZone#strptime`.
+    Support for timestamps in format of seconds (%s) and milliseconds (%Q).
+
+    Fixes #26840.
+
+    *Lev Denisov*
+
+*   Fix `DateAndTime::Calculations#copy_time_to`. Copy `nsec` instead of `usec`.
+
+    Jumping forward or backward between weeks now preserves nanosecond digits.
+
+    *Josua Schmid*
+
+*   Fix `ActiveSupport::TimeWithZone#in` across DST boundaries.
+
+    Previously calls to `in` were being sent to the non-DST aware
+    method `Time#since` via `method_missing`. It is now aliased to
+    the DST aware `ActiveSupport::TimeWithZone#+` which handles
+    transitions across DST boundaries, e.g:
+
+        Time.zone = "US/Eastern"
+
+        t = Time.zone.local(2016,11,6,1)
+        # => Sun, 06 Nov 2016 01:00:00 EDT -05:00
+
+        t.in(1.hour)
+        # => Sun, 06 Nov 2016 01:00:00 EST -05:00
+
+    Fixes #26580.
+
+    *Thomas Balthazar*
+
+*   Remove unused parameter `options = nil` for `#clear` of
+    `ActiveSupport::Cache::Strategy::LocalCache::LocalStore` and
+    `ActiveSupport::Cache::Strategy::LocalCache`.
+
+    *Yosuke Kabuto*
+
+*   Fix `thread_mattr_accessor` subclass no longer overwrites parent.
+
+    Assigning a value to a subclass using `thread_mattr_accessor` no
+    longer changes the value of the parent class. This brings the
+    behavior inline with the documentation.
+
+    Given:
+
+        class Account
+          thread_mattr_accessor :user
+        end
+
+        class Customer < Account
+        end
+
+        Account.user = "DHH"
+        Customer.user = "Rafael"
+
+    Before:
+
+        Account.user  # => "Rafael"
+
+    After:
+
+        Account.user  # => "DHH"
+
+    *Shinichi Maeshima*
+
+*   Since weeks are no longer converted to days, add `:weeks` to the list of
+    parts that `ActiveSupport::TimeWithZone` will recognize as possibly being
+    of variable duration to take account of DST transitions.
+
+    Fixes #26039.
+
+    *Andrew White*
+
+*   Defines `Regexp.match?` for Ruby versions prior to 2.4. The predicate
+    has the same interface, but it does not have the performance boost. Its
+    purpose is to be able to write 2.4 compatible code.
+
+    *Xavier Noria*
+
+*   Allow `MessageEncryptor` to take advantage of authenticated encryption modes.
+
+    AEAD modes like `aes-256-gcm` provide both confidentiality and data
+    authenticity, eliminating the need to use `MessageVerifier` to check if the
+    encrypted data has been tampered with. This speeds up encryption/decryption
+    and results in shorter cipher text.
+
+    *Bart de Water*
+
+*   Introduce `assert_changes` and `assert_no_changes`.
+
+    `assert_changes` is a more general `assert_difference` that works with any
+    value.
+
+        assert_changes 'Error.current', from: nil, to: 'ERR' do
+          expected_bad_operation
+        end
+
+    Can be called with strings, to be evaluated in the binding (context) of
+    the block given to the assertion, or a lambda.
+
+        assert_changes -> { Error.current }, from: nil, to: 'ERR' do
+          expected_bad_operation
+        end
+
+    The `from` and `to` arguments are compared with the case operator (`===`).
+
+        assert_changes 'Error.current', from: nil, to: Error do
+          expected_bad_operation
+        end
+
+    This is pretty useful, if you need to loosely compare a value. For example,
+    you need to test a token has been generated and it has that many random
+    characters.
+
+        user = User.start_registration
+        assert_changes 'user.token', to: /\w{32}/ do
+          user.finish_registration
+        end
+
+    *Genadi Samokovarov*
+
+*   Add `:fallback_string` option to `Array#to_sentence`. If an empty array
+    calls the function and a fallback string option is set then it returns the
+    fallback string other than an empty string.
+
+    *Mohamed Osama*
+
+*   Fix `ActiveSupport::TimeZone#strptime`. Now raises `ArgumentError` when the
+    given time doesn't match the format. The error is the same as the one given
+    by Ruby's `Date.strptime`. Previously it raised
+    `NoMethodError: undefined method empty? for nil:NilClass.` due to a bug.
+
+    Fixes #25701.
+
+    *John Gesimondo*
+
+*   `travel/travel_to` travel time helpers, now raise on nested calls,
+     as this can lead to confusing time stubbing.
+
+     Instead of:
+
+         travel_to 2.days.from_now do
+           # 2 days from today
+           travel_to 3.days.from_now do
+             # 5 days from today
+           end
+         end
+
+     preferred way to achieve above is:
+
+         travel 2.days do
+           # 2 days from today
+         end
+
+         travel 5.days do
+           # 5 days from today
+         end
+
+     *Vipul A M*
+
+*   Support parsing JSON time in ISO8601 local time strings in
+    `ActiveSupport::JSON.decode` when `parse_json_times` is enabled.
+    Strings in the format of `YYYY-MM-DD hh:mm:ss` (without a `Z` at
+    the end) will be parsed in the local timezone (`Time.zone`). In
+    addition, date strings (`YYYY-MM-DD`) are now parsed into `Date`
+    objects.
+
+    *Grzegorz Witek*
+
+*   Fixed `ActiveSupport::Logger.broadcast` so that calls to `#silence` now
+    properly delegate to all loggers. Silencing now properly suppresses logging
+    to both the log and the console.
+
+    *Kevin McPhillips*
+
 *   Remove deprecated arguments in `assert_nothing_raised`.
 
     *Rafel Mendonça França*
@@ -9,7 +190,7 @@
 
     *Sean Griffin*
 
-*   Introduce Module#delegate_missing_to.
+*   Introduce `Module#delegate_missing_to`.
 
     When building a decorator, a common pattern emerges: