anchor.diff:  
     .clearfix
     #buttons
  -    button#preview Preview Tree
  -    button#latex Download LaTeX source
  -    button#pdf Download PDF
  -    button#copytree Copy Tree
  -    button#pastetree Paste Tree
  +    button#preview(tabindex=21) Preview Tree
  +    button#latex(tabindex=22) Download LaTeX source
  +    button#pdf(tabindex=23) Download PDF
  +    button#copytree(tabindex=24) Copy Tree
  +    button#pastetree(tabindex=25) Paste Tree
   
     #previewimage
   
  
positive.code:           ul
              #ligatures
                li.checkbox
                  input#ligaturesinput(type='checkbox',name='ligatures',value='1')
                  label(for='ligaturesinput') Extra Ligatures
              #arabic
                li Arabic:
                li
                  select(name='arabic')
                    option(value='noop') (no override)
                    option(value='amiri', selected='selected') Amiri
                    option(value='arefruqaa') Aref Ruqaa
  
negative.code:             #hebrew
                li Hebrew:
                li
                  select(name='hebrew',tabindex=17)
                    option(value='noop') (no override)
                    option(value='cardo') Cardo
                    option(value='david') David CLM
  