private String indent(int level){
  final String s="...";
  if (level == 0)   return "";
  StringBuilder sb=new StringBuilder(level * s.length());
  for (int i=0; i < level; i++) {
    sb.append(s);
  }
  return s.toString();
}

private String indent ( int level ) { final String s = "..." ; if ( level == 0 ) return "" ; StringBuilder sb = new StringBuilder ( level * s . length ( ) ) ; for ( int i = 0 ; i < level ; i ++ ) { sb . append ( s ) ; } return s . toString ( ) ; }
generates an indentation string .
