anchor.diff:  In this case the ClojureScript compiler will recursive search this directory
   for `.js` files and automatically create the `:foreign-libs` entries for you
   with the supplied options. The `:provides` namespace for each entry will
  -automatically be created from the the directory structure.
  +automatically be created from the directory structure.
   
   Let's create the main ClojureScript namespace:
   
  
positive.code: [[prerequisites]]
  == Prerequisites
  
  This guide assumes you have the latest release of JDK 8 and the latest stable
  version of Node.js installed for the REPL portion of the guide. This guide only
  uses Leiningen for managing dependencies and is easily adapted to Boot or Maven.
  
  [[es6]]
  == ES6
  
negative.code: == Using the REPL
  
  Since JavaScript modules simply get compiled into Google Closure namespaces, all
  of the generic ClojureScript REPL features just work. For example, if you want
  automatic hot-loading of your ES6 source files just use Figwheel.
  
  We'll demonstrate manual hot-loading with the standard Node.js REPL.
  
  