anchor.diff:  3+|*Key Prefix:* table_header_cell
   
   |align
  -|left {vbar} center {vbar} right
  +|<<text-alignments,Text alignment>>
   |table:
     header_cell:
       align: center
  
positive.code: 3+|*Key Prefix:* heading
  
  |align
  |left {vbar} center {vbar} right {vbar} justify +
  (default: left)
  |heading:
    align: center
  
negative.code: 3+|*Key Prefix:* title_page
  
  |align
  |<<text-alignments,Text alignment>> +
  (default: center)
  |title_page:
    align: right
  