Skip tests using deprecated +proper_table_name+ method.

This prevents deprecation warnings from popping up.

Deprecating passing strings as class name in fixtures.

Making proper_table_name take in options.

Show exceptions in text format for xhr requests

Docs: fix typo in file path, should include extension. [ci skip]

remove not used instance variable

Add a note about edge guides in the feedback section [ci skip]

The options will specify the prefix and the suffix. Also, I'm moving the
method to be an instance method on the +Migration+ instance. This makes more
sense than being a class method on the +Migrator+ class because the only
place that uses it is on a +Migration+ instance (in a method_missing
hook). The logic for the Migrator shouldn't be doing any work to
calculate the table name, it should be the Migration itself.

Also made some small indentation fixes.

Performance regression in AR::Base.respond_to?

[PG adapter] Use infinity const

Add examples of AR order method's hash notation to Rails Guide [ci skip]

Added bug report template for ActionController

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

Caches the patterns of ActiveRecord::DynamicMatchers in a class instance
variable.

[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=