anchor.diff:  Now we are going to compile a `simple` (using `-O`) build, targeting 
   Node (using `-t`), specifying where we'd like our final output file (using `-o`):
   
  -[source, bash]
  -----
  -java -cp src:cljs.jar cljs.main -t node -O simple -o main.js -c my-app.core
  +[source,bash]
  +----
  +clj -m cljs.main -t node -O simple -o main.js -c my-app.core
   ----
   
   On Windows:
  
positive.code: 
  [source,bash]
  ----
  java -cp cljs.jar:src cljs.main -w src -c my-app.core -r
  ----
  
  On Windows:
  
negative.code: 
  [source,bash]
  ----
  clj -m cljs.main -re node -m my-app.core 5
  ----
  
  On Windows:
  