fix multiple options

example.js

@@ -65,7 +65,7 @@ const ops = {
   }
 }
 
-const fuse = new Fuse('./mnt', ops, { debug: true })
+const fuse = new Fuse('./mnt', ops, { debug: true, displayFolder: true })
 fuse.mount(err => {
   if (err) throw err
   console.log('filesystem mounted on ' + fuse.mnt)

index.js

@@ -186,11 +186,11 @@ class Fuse extends Nanoresource {
     if (this.opts.modules) options.push('modules=' + this.opts.modules)
 
     if (this.opts.displayFolder && IS_OSX) { // only works on osx
-      options.push('volname=' + path.basename(this.mnt))
+      options.push('volname=' + path.basename(this.opts.name || this.mnt))
       if (HAS_FOLDER_ICON) options.push('volicon=' + OSX_FOLDER_ICON)
     }
 
-    return options.map(o => '-o' + o).join(' ')
+    return options.length ? '-o' + options.join(',') : ''
   }
 
   _makeHandlerArray () {