Special note in documentation: the 'log' variable from GroovyTestCase

Much of the confusion over logging during the test phase seems to be related to the 'log' property.
Throughout Grails, log4j is used as the logging framework and automagically exposed as the 'log' property. However, when writing a test case, the 'log' property (inherited from groovy.util.GroovyTestCase) is a java.util.logging.Logger. The documentation should make a note of this 'gotcha'.

class MyController {
  def index = {
    log.debug('This is a debug message in the controller') //log4j
  }
}

class MyControllerTests extends ControllerUnitTestCase {
  void testIndex() {
    def model = controller.index()
    log.finer('This is a debug-ish message in the unit test code') //java.util.logging
  }
}