Allow nested renders to use the same scope object

lib/armadillo.rb

@@ -141,7 +141,7 @@ def get_frame(block_name, frame)
   # @return [String]
   # @api public
   def self.render(template_path, locals = {}, options = {})
-    scope = options.delete(:scope) { Object.new }
+    scope = options.fetch(:scope) { Object.new }
     context = TemplateContext.new(scope, options)
     _render(template_path, locals, context, options)
   end

spec/template_spec.rb

@@ -88,6 +88,21 @@ def obj.some_text
           "<h2>Subtitle</h2>"
         ])
       end
+
+      it "uses the same scope object" do
+        obj = Object.new
+        def obj.some_text
+          "text!"
+        end
+        content = Armadillo.render("with_sub_template2.html", {}, {
+          :base_path => TEMPLATES_PATH,
+          :escape_html => true,
+          :scope => obj
+        })
+        assert_lines_match(content, [
+          "<h2>text!</h2>"
+        ])
+      end
     end
   end
 

spec/templates/sub_template2.html.erb

@@ -0,0 +1 @@
+<h2><%= some_text %></h2>

spec/templates/with_sub_template2.html.erb

@@ -0,0 +1,2 @@
+<h1>Title</h1>
+<%== render("sub_template2.html") %>