freeze the constant value so it isn't duped when used as a hash key
reduce the amount of code Ruby has to parse
Remove the deprecated include_seconds argument from distance_of_time_in_words

Pass in an :include_seconds hash option to use this feature.
Remove deprecated constants autoload

These constants were removed in 4b97ce5eb16cc20207516387fba98bf577e2e281,
but I forgot to remove the autoload calls :sparkles:.
Remove deprecated Rails application fallback for integration testing

Set ActionDispatch.test_app instead.
Merge pull request #11258 from frodsan/remove_deprecated_distinct

Remove deprecated SchemaStatements#distinct
Merge pull request #11134 from wangjohn/object_orienting_testing_rake_file

Making the rake file for tests easier to read.
Merge pull request #10909 from dockyard/master

Use symbols instead of strings in ActiveSupport::Concern
Remove deprecated Hash#diff with no replacement.

If you're using it to compare hashes for the purpose of testing,
please use MiniTest's assert_equal instead.
Merge pull request #10565 from prathamesh-sonpatki/rake-db

Improved grammar and replaced 'dbs' slang with 'databases'
Removed deprecated method `columns_for_remove`
Merge pull request #11263 from neerajdotname/columns_for_remove

Removed deprecated method `columns_for_remove`
use American English: "favor" not "favour" [ci skip]

according to http://guides.rubyonrails.org/api_documentation_guidelines.html#english
Remove deprecated `ActiveRecord::Fixtures.find_table_name` in favour of `ActiveRecord::Fixtures.default_fixture_model_name`.
Merge pull request #11264 from vipulnsward/deprecate_find_table_name

Remove deprecated `ActiveRecord::Fixtures.find_table_name`
Remove deprecated `Time#time_with_datetime_fallback`, `Time#utc_time`
    and `Time#local_time` in favour of `Time#utc` and `Time#local`
Merge pull request #11265 from vipulnsward/deprecated_time_methods

Remove deprecated `Time` methods
Add patch level to Ruby version information

Given the recent security related patches to ruby and rails it is more
important than ever to know what patch level you are running.
Merge pull request #11267 from TylerBrock/add-patch-level-to-info

Add patch level to Ruby version information
Grammar fix debugging rails applications [ci skip]