anchor.diff:  :toc: macro
   
   .My Table of Contents
  -[%collapsible]
   ====
   toc::[]
   ====
   
   == Some Section
  -....
  -
  -== Levels
  -
  -By default, sections of level 1 and 2 are contained in the table of contents. The number of levels displayed can be
  -customized using the `toclevels` attribute (for both default and macro mode):
  -
  -[listing]
  -....
  -= Page Title
  -:toc:
  -:toclevels: 4
  -
  -== Some Section
   ....
positive.code: == Some Section
  ....
  
  === TOC Title - Option 2
  
  [listing]
  ....
  
negative.code: == Title for Table of Contents
  
  Specifying a title for the table of contents using the `toc-title` attribute is currently not supported. Instead, when
  using the macro mode, a custom title can be emulated using arbitrary AsciiDoc markup.
  
  Custom table of contents title using some bold text:
  
  [listing]
  ....
  