Change ActionController::Parameters#require behavior when value is empty
When the value for the required key is empty an ActionController::ParameterMissing is raised which gets caught by ActionController::Base and turned into a 400 Bad Request reply with a message in the body saying the key is missing, which is misleading.

With these changes, ActionController::EmptyParameter will be raised which ActionController::Base will catch and turn into a 400 Bad Request reply with a message in the body saying the key value is empty.
Renamed generated_feature_methods to generated_association_methods.
Updated 3.2.x link [ci skip]
Update I18n guide to note the additional features of the `translate` view helper
Update 3_2_release_notes.md

Code style adherence
Fixes typo
Update 4_0_release_notes.md

Code Highlighted
Update workaround for "Outside the Scope of Strong Parameters" 

The previous example of how to permit a hash of unknown keys used .tap, but had the side effect of logging an "Unpermitted parameters" message despite being a successful workaround. The proposed workaround is ever so slightly better, imo, because it won't result in an "Unpermitted parameters" message being logged.
warning about saving models with dirty attributes

See #8328
Fix undefined method error for NilClass

Add .try to prevent undefined method error for NilClass.
Fixed URL link to rendered_component plugin [ci skip]
rephrase the overriding views part about the view path

See rails/rails#12608
fix typo introduced when searching in markdown document with vim
guides/rails_on_rack: Fix formatting of _Internal Middleware Stack_ section
Minor doc fix of ActiveModel::Naming.

- qoute example line's result when it kind of String
- right ("singular_route_key") method in example
Hstore and JSON fields are not supported with store

The use of `store` on Hstore fields (for instance) is not needed
because serialization aimed to interact with Ruby objects and not
with provided field types
Added rubysl-rexml to Rubinius deps.
Remove "circular require considered harmful" error

rails/generators should not load rails/generators/base since the
latter is loading it.
Merge pull request #12732 from razielgn/additional-rbx-dep

Added rubysl-rexml to Rubinius deps.
Passing args for gemfile entry

Fixing build