update elements and fix some bugs

lib/src/prism/plugins/file-highlight/prism-file-highlight.min.js

-!function(){self.Prism&&self.document&&document.querySelector&&(self.Prism.fileHighlight=function(){var e={js:"javascript",html:"markup",svg:"markup",xml:"markup",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell"};Array.prototype.forEach&&Array.prototype.slice.call(document.querySelectorAll("pre[data-src]")).forEach(function(t){for(var r,a=t.getAttribute("data-src"),s=t,n=/\blang(?:uage)?-(?!\*)(\w+)\b/i;s&&!n.test(s.className);)s=s.parentNode;if(s&&(r=(t.className.match(n)||[,""])[1]),!r){var o=(a.match(/\.(\w+)$/)||[,""])[1];r=e[o]||o}var l=document.createElement("code");l.className="language-"+r,t.textContent="",l.textContent="Loading…",t.appendChild(l);var i=new XMLHttpRequest;i.open("GET",a,!0),i.onreadystatechange=function(){4==i.readyState&&(i.status<400&&i.responseText?(l.textContent=i.responseText,Prism.highlightElement(l)):l.textContent=i.status>=400?"✖ Error "+i.status+" while fetching file: "+i.statusText:"✖ Error: File does not exist or is empty")},i.send(null)})},self.Prism.fileHighlight())}();
+!function(){"undefined"!=typeof self&&self.Prism&&self.document&&document.querySelector&&(self.Prism.fileHighlight=function(){var e={js:"javascript",html:"markup",svg:"markup",xml:"markup",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell"};Array.prototype.forEach&&Array.prototype.slice.call(document.querySelectorAll("pre[data-src]")).forEach(function(t){for(var r,a=t.getAttribute("data-src"),s=t,n=/\blang(?:uage)?-(?!\*)(\w+)\b/i;s&&!n.test(s.className);)s=s.parentNode;if(s&&(r=(t.className.match(n)||[,""])[1]),!r){var o=(a.match(/\.(\w+)$/)||[,""])[1];r=e[o]||o}var l=document.createElement("code");l.className="language-"+r,t.textContent="",l.textContent="Loading…",t.appendChild(l);var i=new XMLHttpRequest;i.open("GET",a,!0),i.onreadystatechange=function(){4==i.readyState&&(i.status<400&&i.responseText?(l.textContent=i.responseText,Prism.highlightElement(l)):l.textContent=i.status>=400?"✖ Error "+i.status+" while fetching file: "+i.statusText:"✖ Error: File does not exist or is empty")},i.send(null)})},self.Prism.fileHighlight())}();