Fix requiring 'active_support/core_ext' by itself

[dv]

This is a fix for a bug that's in 4.2 stable and beyond. I'm unable to do this:

require 'active_support/core_ext'

To just use the core_ext code. It would throw this error:

activesupport/lib/active_support/number_helper.rb:3:in `<module:NumberHelper>': uninitialized constant ActiveSupport::Autoload (NameError)

This fix also requires this commit made on 4-2-stable but not yet added to master.

Test case:

require 'rubygems'
require 'bundler/setup'

require 'active_support/core_ext'

[simi]

@dv dd7bd8c is not needed since it should be removed in master.

[dv]

What should be removed in master, @simi? Trying to load core_ext from master branch makes it complain:

active_support/core_ext/module/deprecation.rb:21:in deprecate': uninitialized constant ActiveSupport::Deprecation (NameError)`

dd7bd8c fixes that error, and then I bump into the error as described in PR.

[simi]

Those requires for active_support/deprecation in dd7bd8c are not needed in master since those deprecations are removed.

[rafaelfranca]

Thank you for the pull request. Before requiring any file of a rails framework you must require the top level file. In your case you must require active_support first.

[dv]

Ah that makes sense. It used to work though, probably by accident. Thanks for clarifying!