anchor.diff:  |
   [options="header"]
   !====
  -! a ! b ! c
  -! 4 ! 4 ! -2
  +! a   ! b   ! c
  +! `4` ! `4` ! `-2`
   !====
   
   |
  
positive.code: |
  [options="header"]
  !====
  ! a ! b ! c
  ! 1 ! 1 ! 0
  !====
  
  |
  
negative.code: |
  [options="header"]
  !====
  ! a      ! ax     ! b      ! c
  ! `true` ! `true` ! `null` ! `null`
  !====
  
  |
  