zeptojs 为毛最后不给加个分号

http://zeptojs.com/zepto.js
他的规范貌似是分号写在开头，这样我combo js的时候就报错了
;(function($){
// __proto__ doesn't exist on IE<11, so redefine
// the Z function to use object extension instead
if (!('__proto__' in {})) {
$.extend($.zepto, {
Z: function(dom, selector){
dom = dom || []
$.extend(dom, $.fn)
dom.selector = selector || ''
dom.__Z = true
return dom
},
// this is a kludge but works
isZ: function(object){
return $.type(object) === 'array' && '__Z' in object
}
})
}

// getComputedStyle shouldn't freak out when called
// without a valid element as argument
try {
getComputedStyle(undefined)
} catch(e) {
var nativeGetComputedStyle = getComputedStyle;
window.getComputedStyle = function(element){
try {
return nativeGetComputedStyle(element)
} catch(e) {
return null
}
}
}
})(Zepto)var myvar = 'test';