Removes caching from ActiveRecord::Core::ClassMethods#relation

Remove unnecessary in HTML 5 type attribute with default value

url in comments - active_support/core_ext/integer/time.rb

http://stdlib.rubyonrails.org/ last updated in 2005

Class variables has been fixed to Singleton instance variables at Rails ...

use extract_options! in cycle helper

The regexp used in titleize matches saxon genitive
and other contractions, only to call capitalize on
the captured text and have the apostrophe upcased
which yields the apostrophe itself. It is more
clear that the regexp matches just what it has to
match.

pass default value as argument to fetch

Revert "Documents that ActiveRecord instances also support []/[]= methods for reading/writing attributes"

This reverts commit a49fe6ec.

Reason: The existing doc about using self[:attribute] is clear enough.

This reverts commit b11113f9.

Only write_attribute and read_attribute were documented and there was no mention to this alternative.

The previous example with just_raise_that_exception method
stopped working because MissingTranslation is not an instance of
Exception class any more, but has a +to_exception+ method.

Also the cleaner way is to re-raise only the desired exception, passing
 everything else to the default ExceptionHandler.

 Additionally this re-raising conflicts with Pluralization backend thus
 we have to add a check that certain missing translation keys should
 be ignored allowing the backend to fall back to the default
 pluralization rule.

Fix url_for when options is nil

stringified keys

RouteSet#url_for was modifying the options hash that belong to the
caller

Remove circular require from AS Deprecation, and fix warnings