Refactoring some reused code into a method (inside of the routes
mapper) and adding a constant for all the possible scopes.
Bring back ActiveRecord::Base#connection_handler removed by mistake on b37399ab
Add option to Class#class_attribute for skipping the query method
Deprecate ActiveRecord#Base.default_scopes?

See #10107.
Merge pull request #10113 from Agis-/default_scopes_predicate

Deprecate ActiveRecord#Base.default_scopes?

Closes #10107
change some more merge to merge! on new hashes
sprockets 2.9.x doesn't work with uglifier 2.0 yet.

See https://travis-ci.org/rails/rails/jobs/6110543#L1285 for the failure

cc @josh
Fix markdown formatting
Merge pull request #10120 from vipulnsward/change_merge_on_new_hash

change some more merge to merge! on new hashes
Merge pull request #10121 from Agis-/patch-2

Fix markdown formatting
Forgot to lock the uglifier version in our Gemfile

Related with 575838795019f7402992e3bfa83a0c5048cf143d
Merge pull request #10101 from wangjohn/refactoring_routing_mapper

Refactoring some reused code into a method (inside of the routes mapper)
Added a bang to the end of +raise_nested_attributes_record_not_found+
method to signify an exception possibly being raised.
Merge pull request #10123 from wangjohn/added_bang_to_raise_nested_attributes_method

Added a bang to the raise_nested_attributes_record_not_found method
each to each_value; remove unused vars
Merge pull request #10127 from vipulnsward/each_to_each_value

each to each_value; remove unused vars