Add failing test cases

test/data/code_block.html

@@ -6,3 +6,8 @@ echo $message;</code></pre>
 <pre><code>&gt; not a quote
 - not a list item
 [not a reference]: http://foo.com</code></pre>
+<hr />
+<pre><code>foo
+
+
+bar</code></pre>

test/data/code_block.md

@@ -8,3 +8,10 @@
     > not a quote
     - not a list item
     [not a reference]: http://foo.com
+
+---
+
+    foo
+
+
+    bar

test/data/fenced_code_block.html

@@ -12,3 +12,7 @@ echo "Hello World";
 <pre><code>the following isn't quite enough to close
 ```
 still a fenced code block</code></pre>
+<pre><code>foo
+
+
+bar</code></pre>

test/data/fenced_code_block.md

@@ -29,3 +29,10 @@ the following isn't quite enough to close
 ```
 still a fenced code block
 ````
+
+```
+foo
+
+
+bar
+```