old_contents: from ROOTaaS.iPyROOT import utils 
  from metakernel import Magic, option
  from metakernel.display import clear_output, display, HTML
  
  
  class DocMagics(Magic):
      def __init__(self, kernel):
          super(DocMagics, self).__init__(kernel)
      
      @option(
          '-r', '--root', action='store', help='Display gui to show ROOT file'
      )            
      def cell_file(self,*args,**kwargs):
          '''Executes JSROOT Guy to see ROOT files'''
          if kwargs["root"]:
             htmlcode = "<script type='text/javascript' src='https://root.cern.ch/js/dev/scripts/JSRootCore.js?gui'></script>"
             #htmlcode += "<div id='simpleGUI' files='"+kwargs["root"]+"' path=''>loading files ... </div>"
             htmlcode += "<iframe width='100%' height='500px'src='https://root.cern.ch/js/dev/?file="+kwargs["root"]+"&autoload="+kwargs["root"]+"' ></iframe>"
             display(HTML(htmlcode))
          self.evaluate = False
          
      @option(
          '-r', '--root', action='store', help='Display gui to show ROOT file'
      )            
      def line_file(self, *args,**kwargs):
          '''Executes JSROOT Guy to see ROOT files'''
          self.cell_help(args,kwargs)
          
  def register_magics(kernel):
      kernel.register_magics(DocMagics)
new_contents: from ROOTaaS.iPyROOT import utils 
  from metakernel import Magic, option
  from metakernel.display import clear_output, display, HTML
  
  
  class DocMagics(Magic):
      def __init__(self, kernel):
          super(DocMagics, self).__init__(kernel)
      
      @option(
          '-r', '--root', action='store', help='Display gui to show ROOT file'
      )            
      def cell_file(self,*args,**kwargs):
          '''Executes JSROOT Gui to see ROOT files'''
          if kwargs["root"]:
             htmlcode = "<script type='text/javascript' src='https://root.cern.ch/js/dev/scripts/JSRootCore.js?gui'></script>"
             #htmlcode += "<div id='simpleGUI' files='"+kwargs["root"]+"' path=''>loading files ... </div>"
             htmlcode += "<iframe width='100%' height='500px'src='https://root.cern.ch/js/dev/?file="+kwargs["root"]+"&autoload="+kwargs["root"]+"' ></iframe>"
             display(HTML(htmlcode))
          self.evaluate = False
          
      @option(
          '-r', '--root', action='store', help='Display gui to show ROOT file'
      )            
      def line_file(self, *args,**kwargs):
          '''Executes JSROOT Guy to see ROOT files'''
          self.cell_help(args,kwargs)
          
  def register_magics(kernel):
      kernel.register_magics(DocMagics)
subject: fix in doc