anchor.diff:            break;
         }
       }
  +    if (letterSpacing != null)
  +      result.add('${prefix}letterSpacing: $letterSpacing');
       if (textAlign != null) {
         switch (textAlign) {
           case TextAlign.left:
  
positive.code:     value = 37 * value + fontSize.hashCode;
      value = 37 * value + fontWeight.hashCode;
      value = 37 * value + fontStyle.hashCode;
      value = 37 * value + textAlign.hashCode;
      value = 37 * value + textBaseline.hashCode;
      value = 37 * value + decoration.hashCode;
  
negative.code:       fontSize: other.fontSize,
        fontWeight: other.fontWeight,
        fontStyle: other.fontStyle,
        letterSpacing: other.letterSpacing,
        textAlign: other.textAlign,
        textBaseline: other.textBaseline,
        height: other.height,
  