anchor.diff:  |===
   |Key |Value Type |Example
   
  -3+|*Key Prefix:* table
  +3+|[#key-prefix-table]*Key Prefix:* <<key-prefix-table,table>>
   
   |background_color
   |<<colors,Color>> +
  
positive.code:   even_row:
      background_color: #f9f9f9
  
  3+|*Key Prefix:* table_cell
  
  |padding
  |<<measurement-units,Measurement>> {vbar} <<measurement-units,Measurement[top,right,bottom,left]>> +
  
negative.code: |===
  |Key |Value Type |Example
  
  3+|[#key-prefix-blockquote]*Key Prefix:* <<key-prefix-blockquote,blockquote>>
  
  |border_width^[1]^
  |<<values,Number>> +
  