anchor.diff:    ++++
   ----
   
  -
  +ifdef::env_standard[]
   == Asciidoc-LaTeX environments
   
   Asciidoc-LaTeX supports an `env` construct that maps to LaTeX environments.
  
positive.code: math formats, [blue]#Asciidoc-LaTeX#
  and [blue]#AsciiMath#.
  In Asciidoc-LaTeX,
  one can write `$ a^2 + b^2 = c^2 $` and
  ----
   \[
      e^{2\pi \sqrt{-1}} = 1,
  
negative.code: has been discontinued.
  
  
  == Switches
  
  .Tex header
  To generate a tex file with a minimal header, do:
  