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diff --git a/tools/addon-sdk-1.3/python-lib/markdown/extensions/html_tidy.py b/tools/addon-sdk-1.3/python-lib/markdown/extensions/html_tidy.py
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+++ b/tools/addon-sdk-1.3/python-lib/markdown/extensions/html_tidy.py
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+#!/usr/bin/env python
+
+"""
+HTML Tidy Extension for Python-Markdown
+=======================================
+
+Runs [HTML Tidy][] on the output of Python-Markdown using the [uTidylib][] 
+Python wrapper. Both libtidy and uTidylib must be installed on your system.
+
+Note than any Tidy [options][] can be passed in as extension configs. So, 
+for example, to output HTML rather than XHTML, set ``output_xhtml=0``. To
+indent the output, set ``indent=auto`` and to have Tidy wrap the output in 
+``<html>`` and ``<body>`` tags, set ``show_body_only=0``.
+
+[HTML Tidy]: http://tidy.sourceforge.net/
+[uTidylib]: http://utidylib.berlios.de/
+[options]: http://tidy.sourceforge.net/docs/quickref.html
+
+Copyright (c)2008 [Waylan Limberg](http://achinghead.com)
+
+License: [BSD](http://www.opensource.org/licenses/bsd-license.php) 
+
+Dependencies:
+* [Python2.3+](http://python.org)
+* [Markdown 2.0+](http://www.freewisdom.org/projects/python-markdown/)
+* [HTML Tidy](http://utidylib.berlios.de/)
+* [uTidylib](http://utidylib.berlios.de/)
+
+"""
+
+import markdown
+import tidy
+
+class TidyExtension(markdown.Extension):
+
+    def __init__(self, configs):
+        # Set defaults to match typical markdown behavior.
+        self.config = dict(output_xhtml=1,
+                           show_body_only=1,
+                          )
+        # Merge in user defined configs overriding any present if nessecary.
+        for c in configs:
+            self.config[c[0]] = c[1]
+
+    def extendMarkdown(self, md, md_globals):
+        # Save options to markdown instance
+        md.tidy_options = self.config
+        # Add TidyProcessor to postprocessors
+        md.postprocessors['tidy'] = TidyProcessor(md)
+
+
+class TidyProcessor(markdown.postprocessors.Postprocessor):
+
+    def run(self, text):
+        # Pass text to Tidy. As Tidy does not accept unicode we need to encode
+        # it and decode its return value.
+        return unicode(tidy.parseString(text.encode('utf-8'), 
+                                        **self.markdown.tidy_options)) 
+
+
+def makeExtension(configs=None):
+    return TidyExtension(configs=configs)