anchor.diff:                         color black
                      }
                  }
  -               cell {
  +               cell('B') {
                      value 'A'
                      style {
                          border left, {
  
positive.code:                }
             }
             row {
                 cell 1
                 cell 2
                 cell 3
             }
  
negative.code: file.withOutputStream { out ->
      builder.build(out) {
          sheet('Sample') {
              row(2) {
                 style {
                     background whiteSmoke
                     border top, bottom {
  