rem: s = s.replace(/\s+/g, '_'); 
add: s = s.replace(/\s+/g, '-'); 
context: function URLify(s, num_chars) {    // changes, e.g., "Petty theft" to "petty_theft"    // remove all these words from the string before urlifying    removelist = ["a", "an", "as", "at", "before", "but", "by", "for", "from",                  "is", "in", "into", "like", "of", "off", "on", "onto", "per",                  "since", "than", "the", "this", "that", "to", "up", "via",                  "with"];    r = new RegExp('\\b(' + removelist.join('|') + ')\\b', 'gi');    s = s.replace(r, '');    s = s.replace(/[^\w\s-]/g, '');  // remove unneeded chars    s = s.replace(/^\s+|\s+$/g, ''); // trim leading/trailing spaces    s = s.replace(/\s+/g, '_');      // convert spaces to underscores    s = s.toLowerCase();             // convert to lowercase    return s.substring(0, num_chars);// trim to first num_chars chars}
meta: 779	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/779/c6f375fd1124562cde131c9785e7d7f6771ef7f2/urlify.js/buggy/django/contrib/admin/media/js/urlify.js