Wrap all attributes values into quotes

resolve #23

lib/slim_fast/compiler.ex

@@ -11,17 +11,15 @@ defmodule SlimFast.Compiler do
   defp render_attribute(_, ""), do: ""
   defp render_attribute(name, value) do
     value = cond do
-              is_binary(value) ->
-                "\"" <> value <> "\""
-              is_list(value) ->
-                "\"" <> Enum.join(value, " ") <> "\""
+              is_binary(value) -> value
+              is_list(value) -> Enum.join(value, " ")
               is_tuple(value) ->
                 {_, attrs} = value
                 "<%=" <> attrs[:content] <> "%>"
               true -> to_string(value)
             end
 
-    to_string(name) <> "=" <> value
+    ~s(#{to_string(name)}="#{value}")
   end
 
   defp render_branch(%{type: :doctype, content: text}), do: text

test/compiler_test.exs

@@ -12,7 +12,7 @@ defmodule CompilerTest do
                                               children: [],
                                                content: "Hello World"}]}]}]
 
-    expected = "<div id=<%=variable%> class=\"class\"><p>Hello World</p></div>"
+    expected = ~s(<div id="<%=variable%>" class="class"><p>Hello World</p></div>)
     assert Compiler.compile(tree) == expected
   end
 

test/renderer_test.exs

@@ -193,4 +193,13 @@ defmodule RendererTest do
 
     assert render(slim) == "test"
   end
+
+  test "render attributes specified by variable with spaces in value" do
+    slim = """
+    - style = "display: none"
+    div style=style
+    """
+
+    assert render(slim) == ~s(<div style="display: none"></div>)
+  end
 end