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/ui/actions/JdtActionConstants.java
* (value <code>"org.eclipse.jdt.ui.actions.ShowJavaDoc"</code>).
	 */
	public static final String SHOW_JAVA_DOC= "org.eclipse.jdt.ui.actions.ShowJavaDoc"; 
	
	/**
	 * Edit menu: name of standard Code Assist global action
	 * (value <code>"org.eclipse.jdt.ui.actions.ContentAssist"</code>).
	 */
	public static final String CONTENT_ASSIST= "org.eclipse.jdt.ui.actions.ContentAssist"; 
		
	
	/**
	 * Source menu: name of standard Comment global action
	 * (value <code>"org.eclipse.jdt.ui.actions.Comment"</code>).
	 */
	public static final String COMMENT= "org.eclipse.jdt.ui.actions.Comment"; 
	
	/**
	 * Source menu: name of standard Uncomment global action
	 * (value <code>"org.eclipse.jdt.ui.actions.Uncomment"</code>).
	 */
	public static final String UNCOMMENT= "org.eclipse.jdt.ui.actions.Uncomment"; 
	
	/**
	 * Source menu: name of standard Comment global action
	 * (value <code>"org.eclipse.jdt.ui.actions.AddBlockComment"</code>).
	 * 
	 * @since 3.0
	 */
	public static final String ADD_BLOCK_COMMENT= "org.eclipse.jdt.ui.actions.AddBlockComment";