Remove deprecated method Numeric#to_formatted_s

Andrew White
Remove deprecated method alias_method_chain

Andrew White
Remove deprecated constant MissingSourceFile

Andrew White
Remove deprecated methods Module.qualified_const_defined?, Module.qualified_const_get and Module.qualified_const_set

Andrew White
Remove deprecated :prefix option from number_to_human_size

Andrew White
Remove deprecated method ActiveSupport::HashWithIndifferentAccess.new_from_hash_copying_default

Andrew White
Remove deprecated method Module.local_constants

Andrew White
Remove deprecated file active_support/core_ext/time/marshal.rb

Andrew White
Remove deprecated file active_support/core_ext/struct.rb

Andrew White
Remove deprecated file active_support/core_ext/module/method_transplanting.rb

Andrew White
Remove deprecated method Module.local_constants

Andrew White
Remove deprecated file active_support/core_ext/kernel/debugger.rb

Andrew White
Remove deprecated method ActiveSupport::Cache::Store#namespaced_key

Andrew White
Remove deprecated method ActiveSupport::Cache::Strategy::LocalCache::LocalStore#set_cache_value

Andrew White
Remove deprecated method ActiveSupport::Cache::MemCacheStore#escape_key

Andrew White
Remove deprecated method ActiveSupport::Cache::FileStore#key_file_path

Andrew White
Ensure duration parsing is consistent across DST changes

Previously ActiveSupport::Duration.parse used Time.current and Time#advance to calculate the number of seconds in the duration from an arbitrary collection of parts. However as advance tries to be consistent across DST boundaries this meant that either the duration was shorter or longer depending on the time of year.

This was fixed by using an absolute reference point in UTC which isn't subject to DST transitions. An arbitrary date of Jan 1st, 2000 was chosen for no other reason that it seemed appropriate.

Additionally, duration parsing should now be marginally faster as we are no longer creating instances of ActiveSupport::TimeWithZone every time we parse a duration string.

Fixes #26941.

Andrew White
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
Date.to_s doesn't produce too many spaces. For example, to_s(:short) will now produce 01 Feb instead of 1 Feb.

Fixes #25251.

Sean Griffin

Introduce Module#delegate_missing_to.

When building a decorator, a common pattern emerges:

class Partition
  def initialize(first_event)
    @events = [ first_event ]
  end

  def people
    if @events.first.detail.people.any?
      @events.collect { |e| Array(e.detail.people) }.flatten.uniq
    else
      @events.collect(&:creator).uniq
    end
  end

  private
    def respond_to_missing?(name, include_private = false)
      @events.respond_to?(name, include_private)
    end

    def method_missing(method, *args, &block)
      @events.send(method, *args, &block)
    end
end

With Module#delegate_missing_to, the above is condensed to:

class Partition
  delegate_missing_to :@events

  def initialize(first_event)
    @events = [ first_event ]
  end

  def people
    if @events.first.detail.people.any?
      @events.collect { |e| Array(e.detail.people) }.flatten.uniq
    else
      @events.collect(&:creator).uniq
    end
  end
end

Genadi Samokovarov, DHH

Rescuable: If a handler doesn't match the exception, check for handlers matching the exception's cause.

Jeremy Daer

Please check 5-0-stable for previous changes.

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