Checking blank if tag might coming nil or blank

In log it should not show the empty array.

Postgres: Do not attempt to deallocate a statement if the connection is no longer active.

The :actionmailer i18n scope part is not used and according to https://github.com/rails/rails/pull/2542 the implementation is correct.

Adding ActionDispatch::RequestId in middleware test

[engines guide] explanation of overriding views + referencing routes from an engine within an application

Regexp fixup

[engines guide] some fixes for the author id migration including proof of not copying over other migrations again

Programatically define the log level methods and use the Logger constants instead (SyslogLogger didnt define them as I expected)

New #added? method on ActiveModel::Errors

Blah, SecureRandom#uuid is not supported in 1.8.7 -- cant wait for Rails 4.0 to drop compatibility with 1.8.x

The #added? method makes it possible to check if a specific error has been added, using the same parameters as for #add.

Remove superfluous assignment in cookies