为什么 Bootstrap 的 js 源码不写分号？

看了很多 Bootstrap 源码，发现每句话都不加分号，这样写有什么特殊意义么？随便贴一段：

Tab.prototype.show = function () {
    var $this    = this.element
    var $ul      = $this.closest('ul:not(.dropdown-menu)')
    var selector = $this.attr('data-target')
    if (!selector) {
        selector = $this.attr('href')
        selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
    }
    if ($this.parent('li').hasClass('active')) return
    var previous = $ul.find('.active:last a')[0]
    var e        = $.Event('show.bs.tab', {
        relatedTarget: previous
    })
    $this.trigger(e)
    if (e.isDefaultPrevented()) return
    var $target = $(selector)
    this.activate($this.parent('li'), $ul)
    this.activate($target, $target.parent(), function () {
        $this.trigger({
        type: 'shown.bs.tab'
        , relatedTarget: previous
        })
    })
}