HTML在Chrome上呈现时会显示�符号

Question

我使用JSOM在SharePoint文档库中创建了一个.HTML文件。当我在谷歌浏览器中查看HTML文件时，它会在每个标记的开头显示�符号。 下面是我用来创建HTML文件的代码

var uploadedDocument;
function uploadFile(arrayBuffer, fileName,UploadclientContext,oList)  
{  
        var bytes = new Uint8Array(arrayBuffer);  
        var i, length, out = '';  
        for (i = 0, length = bytes.length; i < length; i += 1)  
        {  
            out += String.fromCharCode(bytes[i]);  
        }  
        var createInfo = new SP.FileCreationInformation();  
        createInfo.set_url(fileName);  
        createInfo.set_overwrite(true);

        createInfo.set_content(new SP.Base64EncodedByteArray());  
        fileContent =out; 
        for (var i = 0; i < fileContent.length; i++)   
        {  
            createInfo.get_content().append(fileContent.charCodeAt(i));  
        } 
         uploadedDocument = oList.get_rootFolder().get_files().add(createInfo)  

        UploadclientContext.load(uploadedDocument);  
        UploadclientContext.executeQueryAsync(QuerySuccess(fileName), QueryFailure);  
}  

this is HTML is get in browser

谢谢：）