Diagnosis of unreproducible test failure.

https://ci.jenkins-ci.org/job/jenkins_main_trunk/2449/testReport/hudson.console/ConsoleAnnotatorTest/testCompletedStatelessLogAnnotation/
junit.framework.AssertionFailedError: expected:<3> but was:<4>
	at junit.framework.Assert.fail(Assert.java:57)
	at junit.framework.Assert.failNotEquals(Assert.java:329)
	at junit.framework.Assert.assertEquals(Assert.java:78)
	at junit.framework.Assert.assertEquals(Assert.java:234)
	at junit.framework.Assert.assertEquals(Assert.java:241)
	at junit.framework.TestCase.assertEquals(TestCase.java:409)
	at hudson.console.ConsoleAnnotatorTest.testCompletedStatelessLogAnnotation(ConsoleAnnotatorTest.java:69)