def extendMarkdown(self, md, md_globals):
    ' Add MetaPreprocessor to Markdown instance. '
    md.preprocessors.add('meta', MetaPreprocessor(md), '>normalize_whitespace')
Add MetaPreprocessor to Markdown instance.
def extendMarkdown(self, md, md_globals):
    '  '
    md.preprocessors.add('meta', MetaPreprocessor(md), '>normalize_whitespace')