strange text before my header wordpress

I updated my to the new wordpress version yesterday and since then, I have this weird text on top of my website, just above the header, where the toolbar should be.

window._wpemojiSettings = {"baseUrl": "http:\/\/s.w.org\/images\/core\/emoji\/72x72\/","ext": ".png","source": {"concatemoji": "http:\/\/localhost\/wordpress\/wp-includes\/js\/wp-emoji-release.min.js?ver=4.2.1"   } }; ! function(a, b, c) {   function d(a) {     var c = b.createElement("canvas"),       d = c.getContext && c.getContext("2d");     return d && d.fillText ? (d.textBaseline = "top", d.font = "600 32px Arial", "flag" === a ? (d.fillText(String.fromCharCode(55356, 56812, 55356, 56807), 0, 0), c.toDataURL().length > 3e3) : (d.fillText(String.fromCharCode(55357, 56835), 0, 0), 0 !== d.getImageData(16, 16, 1, 1).data[0])) : !1   }   function e(a) {     var c = b.createElement("script");     c.src = a, c.type = "text/javascript", b.getElementsByTagName("head")[0].appendChild(c)   }   var f;   c.supports = {     simple: d("simple"),     flag: d("flag")   }, c.supports.simple && c.supports.flag || (f = c.source || {}, f.concatemoji ? e(f.concatemoji) : f.wpemoji && f.twemoji && (e(f.twemoji), e(f.wpemoji))) }(window, document, window._wpemojiSettings);

Does anyone have a clue?