Revert "No need to pass options which is never used"

Options is needed for some Rails extensions to determine when
referential integrity should be disabled

This reverts commit bcb466c5.

Fixes #5052

Fix sanitize_for_mass_assigment when role is nil

There is an example in Rails documentation that suggests implementing
assign_attributes method for ActiveModel interface, that by default
sends option role with nil. Since mass_assignment_authorizer never
is called without args, we can move the default value internally.

Fix AM format_paragraph helper method if a first word is long

Cosmetic fixes in block_format AM helper method + test

This fixes undef `to_str' for Rack::Chunked::Body when using
caches_action + streaming on an action

Closes #5027

In Ubuntu Chrome, in the last lines of code blocks, the underscore isn't
visible. Increasing the line height slightly seems to fix this. This
problem doesn't exist in Firefox even on Ubuntu. Too lazy to test in
any other OS-browser combo :)

"Or" was not meaningful anymore, per dad7fdc5

Rename field_changed? to _field_changed? so that users can create a field named field

Always reenable _dump task in AR databases rake. Closes #5030

sync __run_callbacks with ruby-trunk

https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/34580
In this revision behavior of respond_to? had changed: now to ask about
protected method one should pass second argument `true`

This allows the internal :_dump task to be called as many times as
required. For instance, `rake db:migrate:redo` calls two tasks that
internally call :_dump, and without reenabling it to be reinvoked,
the database was left in incorrect state.

Remove not used button translation from av locale

Allow collection helpers with block to access current object in the collection

remove unnecessary require core_ext/string/encoding

Exclude rack.request.form_vars from request.filtered_env

This gives a lot more flexibility to the user, for instance to generate
a collection of check boxes and labels, allowing to add custom classes
or data-* attributes to the label/check_box using another object
attribute.

This basically mimics options_for_select functionality that accepts a
third option for each item to generate html attributes for each option.

Sprockets compressors refactor

remove unused require for string encoding 

Fix usage of psql in db:test:prepare

Fix associations with per-class/multiple database connections

Alias reconnect! to reset! for Mysql2 adapter since they have same behavior.

Adding documentation to clarify usage of attributes hash.

Fix ActiveModel serializable hash to return string keys with :methods