Blanklines: Revert pre changes, add testcases

src/compress.liquid

@@ -85,17 +85,9 @@
   {% if _pres.size != 0 %}
     {% if site.compress_html.blanklines %}
       {% assign _lines = _pres.last | split: _LINE_FEED %}
-      {% assign _lastchar = _pres.last | split: "" | last %}
-      {% assign _outerloop = forloop %}
       {% capture _pres_after %}
         {% for _line in _lines %}
           {% assign _trimmed = _line | split: " " | join: " " %}
-          {% if forloop.last and _lastchar == _LINE_FEED %}
-            {% unless _outerloop.last %}
-              {{ _LINE_FEED }}
-            {% endunless %}
-            {% continue %}
-          {% endif %}
           {% if _trimmed != empty or forloop.last %}
             {% unless forloop.first %}
               {{ _LINE_FEED }}

test/expected/blanklines/blanklines.html

@@ -29,9 +29,11 @@
     </pre><pre>
 
     </pre>
-<pre>
+<span>Text</span>
+    <pre>
 
 
 </pre>
 </body>
 </html>
+

test/expected/blanklines/prepre.html

@@ -0,0 +1,3 @@
+<div>
+TEXT<pre></pre><pre></pre>
+</div>

test/source/blanklines/blanklines.html

@@ -38,6 +38,9 @@
 
     </pre>
 
+
+
+<span>Text</span>
 
 
 

test/source/blanklines/prepre.html

@@ -0,0 +1,12 @@
+---
+layout: compress
+---
+
+<div>
+
+TEXT
+<pre></pre>
+
+<pre></pre>
+
+</div>