anchor.diff:  changes will be available in both.
   
   For details of the commands see 
  -[Using docker](https://geoscienceaustralia.github.io/sifra/ch03_installation.html)
  +https://geoscienceaustralia.github.io/sifra/ch03_installation.html[Using docker]
   in the help documentation
   
   
   ### Building the Run Environment Using Anaconda
   
   For simplicity of managing virtual environments and
  -package requirements, [Anaconda](https://docs.anaconda.com/anaconda/)
  +package requirements, https://docs.anaconda.com/anaconda/[Anaconda]
   is a good option.
   It is a free Python distribution, and comes with the ``conda`` tool
   which is both a package manager and environment manager. Instructions
  
positive.code: 
  ## Required packages
  
  [Graphviz](http://graphviz.org/download/)
negative.code: :toc-title:
  :toclevels: 99
  
  # link:http://geoscienceaustralia.github.io/sifra/[SIFRA]
  
  toc::[]
  
  