anchor.diff:                    %%|tr
                       %%|td "style" => "color: blue"
                         Qux
  -                %%|tfoot
  -                  %%|tr
  -                    %%|th
  -                      Good
  -                    %%|th
  -                      Bye!
   
             Would appear like this in a web browser:
   
  
positive.code:                   %%|tr
                      %%|th "colspan" => 2
                        Hello World
                  %%|tbody
                    %%|tr
                      %%|td
  
negative.code:               %|tr
                  %|td "style" => "color: blue"
                    Qux
  
  
        %|section "Bibliographic nodes"
  