Fix the line breaks in a Python functions's doc string

wrapdoc.py

import textwrap

def refill_docstring(func, *args, **kwargs):
    """Fix the text wrapping in a function's docstring.

    This can be useful when creating doc strings dynamically.

    Additional args are options to textwrap.TextWrapper."""
    wrapper = textwrap.TextWrapper(*args, **kwargs)
    # Remove trailing whitespace from all lines
    docstring = re.sub(r'[^\S\n]*\n[^\S\n]*', '\n', func.__doc__)
    # Split on double newline
    paragraphs = re.split(r"[^\S\n]*\n(?:\s*\n)+", func.__doc__)
    dedented_paragraphs = filter(None, map(textwrap.dedent, paragraphs))
    filled_paragraphs = map(wrapper.fill, dedented_paragraphs)
    func.__doc__ = "\n\n".join(filled_paragraphs)