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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _get_diff_text(old, new):
    '''
    Returns the diff of two text blobs.
    '''
    diff = difflib.unified_diff(old.splitlines(1),
                                new.splitlines(1))
    return ''.join([x.replace('\r', '') for x in diff])