context [ ] brightdiff brightdiff diff
   context [ ] brightdiff brightdiff diff
   /context
   context `[A`-Z`]`[A`-Z0`-9_`]`+( ) brightspecial brightspecial normal
   /context
/context
context `[A`-Z`]`[A`-Z0`-9_`]`+( ) brightspecial brightspecial normal
   context [ ] brightdiff brightdiff diff
   /context
   context `[A`-Z`]`[A`-Z0`-9_`]`+( ) brightspecial brightspecial normal
   /context
/context
