Allow controller tests using the spec DSL to match strings.
Add test coverage for the register_spec_type calls.

Add tests for controller tests using the minitest spec DSL.

AS::TC::ConstantLookup walks the test's name to find the constant it is describing.
This additional lookup logic is needed to better support minitest's spec DSL.

Fix collisions with before and after validation callbacks.

Deletion of an extra blank line in configuration template file

This is still an early draft, but let's add it to the index
to have it ready.

[ci skip] Update Performance Testing guide.

- remove Palmist which is no longer available.
- update link to Query Reviewer.

This commit allows a user to do something like:
    before_validation :do_stuff, :on => [ :create, :update ]
    after_validation :do_more, :on => [ :create, :update ]

Removed sorting of attribute names in controller generator.

I believe when people use generators, they typically order the
parameters on the command line in an order that makes sense
to them.  Sorting them in the generated code  makes the order
seem more arbitrary to humans, even though it's less arbitrary
to computers. :-)

Example:

    rails g scaffold Post title:string content:text

The human chose to put title before content. Sorted
attributes in the generated code work but don't match the
human's intent:

    params.require(:posts).permit(:content, :title)

Update Debugging Rails Application guide.

- remove query_stats plugin reference in debugging guide since it is no longer maintained.
- remove exception_logger plugin reference in debugging guide since it is no longer maintained.
- update query_reviewer url to the latest one on github.

Delegate ActionDispatch::Http::UploadedFile#close to tempfile

Update asset test to match one in sprockets-rails

Remove '.rb' from require sentences

Related to 761bc751 and
eb876c4d

This reverts commit 761bc751.

This commit wasn't fixing any issue just using the same table for
different models with different primary keys.

This reverts commit f5654e78.

Conflicts:
	actionmailer/lib/action_mailer/base.rb

Reason: @frodsan asked me to revert since this change is breaking the
documentation in the edge API site

Use default charset/collation only if *neither* is specified. Otherwise we set utf8_unicode_ci collation on latin1 table.