Remove old asset tags API from docs, reflecting changes from #7900
Merge pull request #9031 from virusman/doc-no-asset-concat

Remove old asset tags API from docs
Adding the route_key and param_key tests

This way all the tests are testing the same fields
Test that a DateTime acts_like_date
Missing AS::Deprecation::DeprecatedObjectProxy test
Test that DeprecatedConstantProxy does not warn when accessing its class
Test try! with a block
Test Kernel#quietly
Test that rescue_from accepts a class name in String
Test String#dasherize
Fix some wrong String extensions tests

* ASCII_STRING was not an ASCII String
* BYTE_STRING was not an in valid UTF-8 String
* added an assertion for non-UTF-8 String
A test case name needs to start with "test_"
Merge pull request #9035 from adomokos/aligning_tests

Adding the route_key and param_key tests
Remove warning by using a custom coder

The native JSON library bypasses the `to_json` overrides in
active_support/core_ext/object/to_json.rb by calling its native
implementation directly. However `ActiveRecord::Store` uses a
HWIA so `JSON.dump` will call our `to_json` instead with a
`State` object for options rather than a `Hash`. This generates
a warning when the `:encoding`, `:only` & `:except` keys are
accessed in `Hash#as_json` because the `State` object delegates
unknown keys to `instance_variable_get` in its `:[]` method.

Workaround this warning in the test by using a custom coder that
calls `ActiveSupport::JSON.encode` directly.