Switch the arguments order of assert_renders

For better failure messages, let's switch the arguments order as we are
implicitly relying on assert_equal which expect to have the expected
object first, and the given one then.

test/html5_test.rb

@@ -54,7 +54,7 @@ def test_that_html5_works_with_code_blocks
 </code></pre>
 EOE
 
- assert_renders section, section_expected
- assert_renders header, header_expected
+ assert_renders section_expected, section
+ assert_renders header_expected, header
  end
 end

test/test_helper.rb

@@ -17,8 +17,8 @@ def html_equal(html_a, html_b)
  Nokogiri::HTML::DocumentFragment.parse(html_b).to_html
  end
 
- def assert_renders(markdown, html)
- html_equal parser.render(markdown), html
+ def assert_renders(html, markdown)
+ html_equal html, parser.render(markdown)
  end
 
  private