Ignore lonely comment end tags

src/compress.liquid

@@ -14,13 +14,14 @@
 {% comment %}Remove comments{% endcomment %}
 
 {% if site.compress_html.comments.size == 2 %}
-  {% assign _new = "" %}
   {% assign _comment_befores = _content | split: site.compress_html.comments.first %}
   {% for _comment_before in _comment_befores %}
-    {% assign _comment_after = _comment_before | split: site.compress_html.comments.last | last %}
-    {% assign _new = _new | append: _comment_after %}
+    {% assign _comment_content = _comment_before | split: site.compress_html.comments.last | first %}
+    {% if _comment_content %}
+      {% capture _comment %}{{ site.compress_html.comments.first }}{{ _comment_content }}{{ site.compress_html.comments.last }}{% endcapture %}
+      {% assign _content = _content | remove: _comment %}
+    {% endif %}
   {% endfor %}
-  {% assign _content = _new %}
 {% endif %}
 
 
@@ -30,11 +31,13 @@
 {% assign _pre_befores = _content | split: "<pre" %}
 {% for _pre_before in _pre_befores %}
   {% assign _pres = _pre_before | split: "</pre>" %}
-  {% if _pres.size == 2 %}
-    {% assign _new = _new | append: "<pre" | append: _pres.first | append: "</pre>" %}
+  {% if _pres.size > 0 %}
+    {% if _pres.size == 2 %}
+      {% assign _new = _new | append: "<pre" | append: _pres.first | append: "</pre>" %}
+    {% endif %}
+    {% assign _compressed = _pres.last | split: " " | join: " " %}
+    {% assign _new = _new | append: _compressed %}
   {% endif %}
-  {% assign _compressed = _pres.last | split: " " | join: " " %}
-  {% assign _new = _new | append: _compressed %}
 {% endfor %}
 {% assign _content = _new %}
 

test/expected/comments/fake.html

@@ -0,0 +1,3 @@
+<pre>
+  &lt;!-- Two -->
+</pre>

test/expected/comments/right-angle-bracket.html

@@ -0,0 +1,3 @@
+<pre>
+  &lt;!-- Two -->
+</pre>

test/source/comments/fake.html

@@ -0,0 +1,7 @@
+---
+layout: compress
+---
+
+<pre>
+  &lt;!-- Two -->
+</pre>

test/source/comments/right-angle-bracket.html

@@ -0,0 +1,8 @@
+---
+layout: compress
+---
+
+<!-- One -->
+<pre>
+  &lt;!-- Two -->
+</pre>