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