anchor.diff:  heading:
     margin-top: 6
   
  -|[[min-height-after]]min-height-after
  +|<<min-height-after>>
   |xref:measurement-units.adoc[Measurement] {vbar} auto +
   (default: `20`)
   |[source]
  
positive.code:   h3-text-transform: uppercase
  |===
  
  [#padding]
  === padding
  
  
negative.code: [#heading]
  == heading
  
  The keys in the `heading` category control the style of most headings, including part titles, chapter titles, sections titles, the table of contents title, and discrete headings.
  
  [cols="3,4,5a"]
  |===
  