function _updateRangeLabel(listItem, range) {
        var text = range.name + " " + range.textRange.document.file.name + " : " + (range.textRange.startLine + 1);
        listItem.text(text);
        listItem.attr("title", text);
    }
@constructor
Stores one search result: its source file, line range, etc. plus the DOM node representing it
in the results list.