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Abbreviation Extension for Python-Markdown
==========================================
This extension adds abbreviation handling to Python-Markdown.
Simple Usage:
>>> import markdown
>>> text = """
... Some text with an ABBR and a REF. Ignore REFERENCE and ref.
...
... *[ABBR]: Abbreviation
... *[REF]: Abbreviation Reference
... """
>>> print markdown.markdown(text, ['abbr'])
Some text with an ABBR and a REF. Ignore REFERENCE and ref.
Copyright 2007-2008
* [Waylan Limberg](http://achinghead.com/)
* [Seemant Kulleen](http://www.kulleen.org/)
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Find and remove all Abbreviation references from the text.
Each reference is set as a new AbbrPattern in the markdown instance.
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Given a string, returns an regex pattern to match that string.
'HTML' -> r'(?P<abbr>[H][T][M][L])'
Note: we force each char as a literal match (in brackets) as we don't
know what they will be beforehand.
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