Stray nodoc causes rest of file not parsed [ci skip]

Use `Minitest::Test` instead of old `MiniTest::Unit::TestCase` for bug reports template

* use `Minitest::Test` instead of deprectaed `MiniTest::Unit::TestCase`

 [ci skip]

[JRuby] Skip few of the ActiveSupport's inflector test cases

Conflicts:
	activesupport/test/abstract_unit.rb

Generalize backtrace check on DelegationError.

Skip tests involving $SAFE on Rubinius, it's not supported.

Escape the message of an exception in debug_exceptions to avoid bad rendering

Remove set_primary_key, replace with primary_key=

First deprecated, now removed: https://github.com/rails/rails/commit/9add7608f1acaa68b025470e7a38901d7e6161ca#activerecord/lib/active_record/attribute_methods/primary_key.rb

Stop interpreting SQL 'string' columns as :string type.

Change the wording to explain following methods skip callbacks [ci skip]

ensure freeze on Thread freezes locals (#11831)

Refactor of the work done in #11891

Normalize file parameters in same place as other parameters (ActionDispatch::Http::Parameters#normalize_encode_params)

SSE class for ActionController::Live

This fixes a regression. The documentation said in its introduction
paragraph that the method returns truthy/falsy, but then below it
was said that if there were no arguments you'd get `true` or `false`.
Also when the argument is exactly `false` a singleton is documented
to be returned.

The method was not returning the singletons so it didn't conform to
those special cases.

The best solution here seems to be to just return singletons in all
cases. This solution is backwards compatible. Also, the contract
has been revised because it has no sense that the predicate varies
that way depending on the input. I bet the previous contract was just
an accident, not something mixed on purpose.

Conflicts:
	activerecord/lib/active_record/relation/finder_methods.rb
	activerecord/test/cases/finder_test.rb

Follow-up to #11934

clarify instructions in contributing_to_ruby_on_rails.md for committing ...
[ci skip]

Memcached note for Rails guides [ci skip]

Dont' check for any order in hash since we aren't sorting it and this is determinated only by the used interpreter

blorgh_engine to blorgh