anchor.diff:      this.isBlankLineBetweenPropertiesAndChildren = true,
       this.beforeName = '',
       this.suffixLineOne = '',
  -    this.manditoryFooter = '',
  +    this.mandatoryFooter = '',
     }) : assert(prefixLineOne != null),
          assert(prefixOtherLines != null),
          assert(prefixLastChildLineOne != null),
  
positive.code:         }
        }
      }
      if (parentConfiguration == null && config.manditoryFooter.isNotEmpty) {
        builder.writeStretched(config.manditoryFooter, builder.wrapWidth);
        builder.write(config.lineBreak);
      }
      return builder.build();
  
negative.code:   final String footer;
  
    /// Footer to add even for root nodes.
    final String mandatoryFooter;
  
    /// Add a blank line between properties and children if both are present.
    final bool isBlankLineBetweenPropertiesAndChildren;
  