def get_long_description():
    """Transform README.md into a usable long description.

    Replaces relative references to svg images to absolute https references.
    """

    with open('README.md') as f:
        read_me = f.read()

    def replace_relative_with_absolute(match):
        svg_path = match.group(0)[1:-1]
        return ('(https://github.com/google/pybadges/raw/master/'
                '%s?sanitize=true)' % svg_path)

    return re.sub(r'\(tests/golden-images/.*?\.svg\)',
                  replace_relative_with_absolute,
                  read_me)
Transform README.md into a usable long description.

    Replaces relative references to svg images to absolute https references.