Bug 52750 correct indentation messes with comment boxes
3m7 /* ******** */ /* */ /* ******** */ comes out /* ******** */ /* */ /* ******** */
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/actions/IndentAction.java
/**
	 * Returns if the current selection is valid, i.e. whether it is empty and the caret in the 
	 * whitespace at the start of a line, or covers multiple lines.
	 * 
	 * @return <code>true</code> if the selection is valid for an indent operation
	 */
	private boolean isValidSelection() {
		ITextSelection selection= getSelection();
		if (selection.isEmpty())
			return false;
		
		int offset= selection.getOffset();
		int length= selection.getLength();
		
		IDocument document= getDocument();
		if (document == null)
			return false;
		
		try {
			IRegion firstLine= document.getLineInformationOfOffset(offset);
			int lineOffset= firstLine.getOffset();
			
			
			
			if (length == 0)
				return document.get(lineOffset, offset - lineOffset).trim().length() == 0;
			else
				return false;