Rails 7 adds :day_format option to date_select

Now format how the day looks in a date select dropdown using `day_format`.

Rails 7: Pass default values to I18n's `translate` method

Provide fallback values to the translate method apart from those parts of the translation string.

Rails 7 adds the ability to check if a location is safe before redirecting

Now determine if a URL is an internal one before redirecting.

Rails 7 added --css app generator

Rails 7 added --css app generator for configuring CSS processors.

Rails 7 replaces Webpacker with importmapped Hotwire as default JavaScript setup

A new Rails skeleton will not have to require the full JavaScript toolchain with Webpack by default as Rails 7 embraces the future of Javascript.

Rails 7 adds the possibility to check on :priority for ActiveJob tests

Rails 7 gives us option to set `:priority` in test helper methods `assert_enqueued_with` and `assert_performed_with`.

Rails 7 adds choices to Javascript generator option

Rails 7 introduces built-in support for webpacker and esbuild.

Rails 7: Instrument ActiveStorage analyzers

Rails 7 adds instrumentation for ActiveStorage analyzers so that the time of analysis can be tracked.

Rails 7 adds database-specific setup and reset tasks for multi DB configurations

For multi DB Rails applications starting with Rails 7, we can now setup and reset a particular database.

Rails 7: Add from: option to ActiveSupport::TestCase#assert_no_changes

ActiveSupport::TestCase#assert_no_changes adds additional options.