Fixed typo in django/contrib/admin/static/admin/js/urlify.js.

    function URLify(s, num_chars, allowUnicode) {

        // changes, e.g., "Petty theft" to "petty_theft"

        // changes, e.g., "Petty theft" to "petty-theft"

        // remove all these words from the string before urlifying

        if (!allowUnicode) {

            s = downcode(s);