err code block in erb error

gistfile1.txt

RuntimeError: Tried to render a layout (calls yield) at /Users/araky/blog/webfood/source/articles/2015-11/middleman-wrap-layout-doesnt-work-as-the-doc/index.html.md.erb like it was a template. Non-default layouts need to be in source/layouts.
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/rendering.rb:186:in `rescue in _render_with_all_renderers'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/rendering.rb:175:in `_render_with_all_renderers'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/rendering.rb:149:in `render_template'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/sitemap/resource.rb:127:in `block in render'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/activesupport-4.2.4/lib/active_support/notifications.rb:166:in `instrument'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/util.rb:41:in `instrument'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/application.rb:241:in `instrument'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/sitemap/resource.rb:14:in `instrument'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/sitemap/resource.rb:100:in `render'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/bundler/gems/middleman-blog-a1a34b6ac735/lib/middleman-blog/blog_article.rb:40:in `render'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/request.rb:260:in `process_request'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/request.rb:210:in `block in call!'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/request.rb:209:in `catch'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/request.rb:209:in `call!'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/middleman-core-3.4.0/lib/middleman-core/core_extensions/request.rb:195:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/urlmap.rb:66:in `block in call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `each'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-livereload-0.3.16/lib/rack/livereload.rb:23:in `_call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-livereload-0.3.16/lib/rack/livereload.rb:14:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/showexceptions.rb:24:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/head.rb:13:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/lint.rb:49:in `_call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/lint.rb:37:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/builder.rb:153:in `call'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in `service'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
	/Users/araky/.rbenv/versions/2.1.2/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'