FIX: <pre> blocks were adding too many new lines.

test/javascripts/lib/markdown_test.js

@@ -282,6 +282,10 @@ test("links with full urls", function() {
 
 test("Code Blocks", function() {
 
+  cooked("<pre>\nhello\n</pre>\n",
+         "<p><pre>\nhello</pre></p>",
+         "pre blocks don't include extra lines");
+
   cooked("```\na\nb\nc\n\nd\n```",
          "<p><pre><code class=\"lang-auto\">a\nb\nc\n\nd</code></pre></p>",
          "it treats new lines properly");