anchor.diff:  
   * <<xref/../../reference/reader#,Reader>>
   
  -== $ - Inner class reference
  +== `$` - Inner class reference
   
   Used to reference inner classes and interfaces in Java. Separates the
   container class name and the inner class name.
  
positive.code: * http://blog.jayfields.com/2011/01/clojure-using-java-inner-classes.html[Clojure: Using Java Inner Classes]
  * <<xref/../../reference/java_interop#,Official Documentation>>
  
  == ->, +->>+ some-> cond-> as-> etc. - Threading macros
  
  These are threading macros. Almost all of them take an initial value and
  *tread* this value through a number of forms. Let's imagine (for reasons unknown)
  
negative.code: 
  * https://github.com/edn-format/edn#tagged-elements[EDN Tagged Elements]
  
  == `%` - Argument placeholder
  
  `%` is not a macro, but a placeholder for use in the `#(` macro. It represents
  an argument that will be passed into the function when it is expanded.
  