Use .end() to remove extra line

js/popover.js

@@ -46,8 +46,7 @@
     var content = this.getContent()
 
     $tip.find('.popover-title')[this.options.html ? 'html' : 'text'](title)
-    $tip.find('.popover-content').children().detach()
-    $tip.find('.popover-content')[ // we use append for html objects to maintain js events
+    $tip.find('.popover-content').children().detach().end()[ // we use append for html objects to maintain js events
       this.options.html ? (typeof content == 'string' ? 'html' : 'append') : 'text'
     ](content)