Add double quote atoms

Author: Premwoik

lib/gradient/elixir_expr.ex

@@ -35,7 +35,7 @@ defmodule Gradient.ElixirExpr do
   def pp_expr({:atom, _, val}) do
     case Atom.to_string(val) do
       "Elixir." <> mod -> mod
-      str -> ":" <> str
+      str -> ":\"" <> str <> "\""
     end
   end
 
@@ -420,7 +420,7 @@ defmodule Gradient.ElixirExpr do
 
     if shortand_syntax do
       {:atom, _, key} = key
-      Atom.to_string(key) <> ": " <> value
+      "\"" <> Atom.to_string(key) <> "\": " <> value
     else
       pp_expr(key) <> " => " <> value
     end

lib/gradient/elixir_type.ex

@@ -84,7 +84,10 @@ defmodule Gradient.ElixirType do
   end
 
   def pretty_print({:atom, _, val}) do
-    ":" <> Atom.to_string(val)
+    case Atom.to_string(val) do
+      "Elixir." <> mod -> mod
+      str -> ":\"" <> str <> "\""
+    end
   end
 
   def pretty_print({:integer, _, val}) do