Ensure unquotes are respected in the test macro

Author: José Valim

lib/ex_unit/lib/ex_unit/case.ex

@@ -88,7 +88,7 @@ defmodule ExUnit.Case do
       end
 
       def message, [unquote(Macro.escape var)], [], do:
-        unquote(Macro.escape contents)
+        unquote(Macro.escape contents, escape_unquote: false)
     end
   end
 end

lib/ex_unit/test/ex_unit/case_template_test.exs

@@ -36,6 +36,12 @@ end
 defmodule ExUnit.CaseTemplateTest do
   use ExUnit.SampleCase, async: true
 
+  two = 2
+
+  test "unquoting the value #{two}" do
+    assert 2 == unquote(two)
+  end
+
   test "receives context from parent case", context do
     assert context[:context] == :setup
   end