public MutableString(final MutableString s){
  makeCompactMutableString(s.length());
  System.arraycopy(s.array,0,array,0,array.length);
}

public MutableString ( final MutableString s ) { makeCompactMutableString ( s . length ( ) ) ; System . arraycopy ( s . array , 0 , array , 0 , array . length ) ; }
creates a new compact mutable string copying a given mutable string .
