code: public String getCurrentMaskedLine() {
  		if (!isCurrentLine()) {
  			return null;
  		}
  		StringBuilder str = new StringBuilder();
  		int tagWidth = getTagWidth(currentLine);
  		for (int i = 0; i < tagWidth; ++i) {
  			str.append(" ");
  		}
  		if (currentLine.length() > tagWidth) {
  			str.append(currentLine.substring(tagWidth));
  		}
  		return str.toString();
  	}
docs: Return current line with tag masked with whitespace.