markup should preserve empty lines

Parsedown.php

@@ -687,6 +687,13 @@ class Parsedown
             }
         }
 
+        if (isset($Block['interrupted']))
+        {
+            $Block['element'] .= "\n";
+
+            unset($Block['interrupted']);
+        }
+
         $Block['element'] .= "\n".$Line['body'];
 
         return $Block;

README.md

@@ -1,6 +1,6 @@
 ## Parsedown
 
-Better [Markdown](http://en.wikipedia.org/wiki/Markdown) parser for PHP.
+Better Markdown Parser in PHP
 
 [[ demo ]](http://parsedown.org/demo)
 
@@ -8,7 +8,7 @@ Better [Markdown](http://en.wikipedia.org/wiki/Markdown) parser for PHP.
 
 * [Fast](http://parsedown.org/speed)
 * [Consistent](http://parsedown.org/consistency)
-* [GitHub Flavored](https://help.github.com/articles/github-flavored-markdown)
+* [GitHub flavored](https://help.github.com/articles/github-flavored-markdown)
 * [Tested](http://parsedown.org/tests/) in PHP 5.2, 5.3, 5.4, 5.5, 5.6 and [hhvm](http://www.hhvm.com/)
 * Extensible
 * [Markdown Extra extension](https://github.com/erusev/parsedown-extra) <sup>new</sup>

test/data/sparse_html.html

@@ -0,0 +1,8 @@
+<div>
+line 1
+
+line 2
+line 3
+
+line 4
+</div>

test/data/sparse_html.md

@@ -0,0 +1,8 @@
+<div>
+line 1
+
+line 2
+line 3
+
+line 4
+</div>