String prefix(String s) {
         return prefix(s, feedback.getPre(), feedback.getPost());
    }
String prefix ( String s ) { return prefix ( s , feedback . getPre ( ) , feedback . getPost ( ) ) ; }
Add normal prefixing/postfixing to embedded newlines in a string,
bracketing with normal prefix/postfix

@param s the string to prefix
@return the pre/post-fixed and bracketed string