Handle special forms signatures properly

Author: José Valim

lib/ex_doc/html_formatter/templates.ex

@@ -46,7 +46,14 @@ defmodule ExDoc.HTMLFormatter.Templates do
 
  # Get the full signature from a function
  defp signature(ExDoc.FunctionNode[name: name, signature: args]) do
- Macro.to_string { name, 0, args }
+ cond do
+ name in [:__aliases__, :__block__] ->
+ "#{name}(args)"
+ name in [:__ENV__, :__MODULE__, :__DIR__, :__CALLER__] ->
+ "#{name}"
+ true ->
+ Macro.to_string { name, 0, args }
+ end
  end
 
  # Get the first paragraph of the documentation of a node, if any.