Bug 40772 [plan item] Smart tab on empty lines
When having the caret on an empty line, pressing tab cleans up the line and sets the caret it the right indentation column.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
private IJavaElement fRememberedElement;
	
	private ITextSelection fRememberedSelection;
	
	private int fRememberedElementOffset;
	
	private BracketInserter fBracketInserter= new BracketInserter();
	
	private GenerateActionGroup fGenerateActionGroup;
	private CompositeActionGroup fContextMenuGroup;
	
	/**
	 * Creates a new compilation unit editor.
	 */
	public CompilationUnitEditor() {
		super();
		setDocumentProvider(JavaPlugin.getDefault().getCompilationUnitDocumentProvider());
		setEditorContextMenuId("#CompilationUnitEditorContext"); 
		setRulerContextMenuId("#CompilationUnitRulerContext"); 
		setOutlinerContextMenuId("#CompilationUnitOutlinerContext"); 
		
		fSavePolicy= null;
		
		fJavaEditorErrorTickUpdater= new JavaEditorErrorTickUpdater(this);
	}
	
	/*
	 * @see AbstractTextEditor#createActions()
	 */