here is a diff

  lang=diff
  @@ derp derp @@
  x
  y

  - x
  - y
  + z

derp derp
~~~~~~~~~~
<p>here is a diff</p>

<div class="remarkup-code-block" data-code-lang="diff" data-sigil="remarkup-code-block"><pre class="remarkup-code">@@ derp derp @@
x
y

- x
- y
+ z</pre></div>

<p>derp derp</p>
~~~~~~~~~~
here is a diff

  @@ derp derp @@
  x
  y
  
  - x
  - y
  + z

derp derp