Broke commit validation.

java.lang.IllegalArgumentException: Already listening to
/hudson/workdir/jobs/trunk/workspace/xtest/instance/work/sys/ide/SampleRailsApplication/script
	at org.netbeans.modules.ruby.modules.project.rake.FileChangeSupport.addListener(FileChangeSupport.java:92)
	at org.netbeans.modules.ruby.spi.project.support.rake.SourcesHelper$SourcesImpl.listen(SourcesHelper.java:475)
	at org.netbeans.modules.ruby.spi.project.support.rake.SourcesHelper$SourcesImpl.getSourceGroups(SourcesHelper.java:409)
	at org.netbeans.modules.ruby.railsprojects.RailsSources$2.run(RailsSources.java:114)
	at org.netbeans.modules.ruby.railsprojects.RailsSources$2.run(RailsSources.java:105)
	at org.openide.util.Mutex.readAccess(Mutex.java:327)
	at org.openide.util.Mutex$1R.run(Mutex.java:1299)
	at org.netbeans.api.project.ProjectManager$2$1.run(ProjectManager.java:120)
	at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499)
	at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:215)
	at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
	at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
	at org.openide.util.Mutex.readAccess(Mutex.java:275)
	at org.netbeans.modules.ruby.railsprojects.RailsSources.getSourceGroups(RailsSources.java:104)
	at org.netbeans.spi.project.support.LookupProviderSupport$SourcesImpl.getSourceGroups(LookupProviderSupport.java:259)
	at org.netbeans.modules.localhistory.LocalHistory.setRoots(LocalHistory.java:135)
	at org.netbeans.modules.localhistory.LocalHistory.access$000(LocalHistory.java:75)
	at org.netbeans.modules.localhistory.LocalHistory$2$1.run(LocalHistory.java:252)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)