issue 668, htmlmin.py, thanks kerncece

gluon/contrib/minify/htmlmin.py

@@ -0,0 +1,13 @@
+# coding: utf-8
+
+import re
+
+def minify(response):
+  def _replace(match):
+    match = match.group()
+    # save whole <pre>, <textarea> tags, and opening <!-- (so it doesn't break <script>)
+    # otherwise, replace all whitespace with a single space character
+    return match if match.startswith(('<pre', '<textarea', '<!--')) else ' '
+  
+  cpat = re.compile(r'\s+|<pre(.*?)</pre>|<textarea(.*?)</textarea>|<!--\s', re.DOTALL)
+  return cpat.sub(_replace, response)