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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 quick_url(comment):
 """Return the URL for the comment without fetching its submission."""

    def to_id(fullname):
        return fullname.split('_', 1)[1]
    return ('http://www.reddit.com/r/{}/comments/{}/_/{}?context=3'
            .format(comment.subreddit.display_name, to_id(comment.link_id),
                    comment.id))