This feature adds a lot of complication to ActiveRecord for dubious
value. Let's talk about what it does currently:

class Customer < ActiveRecord::Base
  composed_of :balance, :class_name => "Money", :mapping => %w(balance amount)
end

Instead, you can do something like this:

    def balance
      @balance ||= Money.new(value, currency)
    end

    def balance=(balance)
      self[:value] = balance.value
      self[:currency] = balance.currency
      @balance = balance
    end

Since that's fairly easy code to write, and doesn't need anything
extra from the framework, if you use composed_of today, you'll
have to add accessors/mutators like that.

Closes #1436
Closes #2084
Closes #3807

Closes #6754

Closes #6697

Based on examples seen in the Rails test suite. [ci skip]

fix invalid syntax and sqlite rake failing tests

add :nodoc: to AR::Tasks and update to follow the coding conventions

Fix build: check if sqlite3 file exists before remove

Get logic out of db rake tasks, and into classes and objects

bump AS deprecation_horizon to 4.1

Now isn't that better?

And yes, I know that private has no impact on class methods - it's a visual distinction, not a technical one.

Bump tzinfo gem.

Avoid unnecessary catching of Exception instead of StandardError.

Fixing load config in some tasks

Without this, some tasks won't load configurations
like custom engines.

Minimal implementation that supports db:create SQLite replacement

Don't read csv file during executing db:fixtures:load.

Respect absolute paths in compute_source_path.

When using compute_source_path to determine the full path of an
asset, if our source begins with '/', we don't want to include
the directory. Examples are illustrative:

> compute_source_path("foo", "stylesheets", "css")
=> "/Users/steve/src/my_app/public/stylesheets/foo.css"
> compute_source_path("/foo", "stylesheets", "css")
=> "/Users/steve/src/my_app/public/foo.css"

Before this patch, the second example would return the same as the
first.

Fixes #5680.

Documentation: "asynchronously" is misleading here

Documentation: make it clearer that subscribers are not notified asynchronously, but saved for later use.

Fix doc example for dasherize