Add support for using an ARCONFIG environment variable to specify the location of the config.yml file for running the tests

Make assert_no_queries literally enforce that there are no queries. As in, not a single line of SQL should be sent to the database, not even stuff that is ignored by assert_queries. The argument being that if you write assert_no_queries, you really do not want there to be any queries.

Don't wrap operations on collection associations in transactions when they are not needed, so the connection adapter does not send empty BEGIN COMMIT transactions blocks to the database.

backslash insertion for RDoc main page ignores code blocks, also adds comments to explain what's this hack about

With the previous pattern RDoc processed

    railties/lib/rails/generators/rails/plugin_new/templates/test/%name%_test.rb

and that resulted in a spurious "<" class.

Fixing select[multiple] html specification problem.

Utf8 enforcer param customization

Make tests stronger, cleaner and slimmer

be considered as failure

Test for specific value to the extent possible

This reverts commit 115e80dc.

Remove unused variable causing warning in 1.9.3

Render inline fix for master

This will make sure `render :inline` is working.

Closes #1633

rails runner without any options should show usage information

Ensure engine migrations are copied in correct sequence