old_contents: """Simple magics for display formats"""
  #-----------------------------------------------------------------------------
  #  Copyright (c) 2012 The IPython Development Team.
  #
  #  Distributed under the terms of the Modified BSD License.
  #
  #  The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  # Our own packages
  from IPython.core.display import display, Javascript, Latex, SVG, HTML
  from IPython.core.magic import  (
      Magics, magics_class, cell_magic
  )
  
  #-----------------------------------------------------------------------------
  # Magic implementation classes
  #-----------------------------------------------------------------------------
  
  
  @magics_class
  class DisplayMagics(Magics):
      """Magics for displaying various output types with literals
      
      Defines javascript/latex/svg/html cell magics for writing 
      blocks in those languages, to be rendered in the frontend.
      """
      
      @cell_magic
      def javascript(self, line, cell):
          """Run the cell block of Javascript code"""
          display(Javascript(cell))
          
      
      @cell_magic
      def latex(self, line, cell):
          """Render the cell as a block of latex
          
          This magic only renders the subset of latex defined by MathJax 
          [here](https://docs.mathjax.org/en/v2.5-latest/tex.html)."""
          display(Latex(cell))
  
      @cell_magic
      def svg(self, line, cell):
          """Render the cell as an SVG literal"""
          display(SVG(cell))
  
      @cell_magic
      def html(self, line, cell):
          """Render the cell as a block of HTML"""
          display(HTML(cell))
  
new_contents: """Simple magics for display formats"""
  #-----------------------------------------------------------------------------
  #  Copyright (c) 2012 The IPython Development Team.
  #
  #  Distributed under the terms of the Modified BSD License.
  #
  #  The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  # Our own packages
  from IPython.core.display import display, Javascript, Latex, SVG, HTML
  from IPython.core.magic import  (
      Magics, magics_class, cell_magic
  )
  
  #-----------------------------------------------------------------------------
  # Magic implementation classes
  #-----------------------------------------------------------------------------
  
  
  @magics_class
  class DisplayMagics(Magics):
      """Magics for displaying various output types with literals
      
      Defines javascript/latex/svg/html cell magics for writing 
      blocks in those languages, to be rendered in the frontend.
      """
      
      @cell_magic
      def javascript(self, line, cell):
          """Run the cell block of Javascript code"""
          display(Javascript(cell))
          
      
      @cell_magic
      def latex(self, line, cell):
          """Render the cell as a block of latex
          
          The subset of latex which is support depends on the implementation in
          the client.  In the Jupyter Notebook, this magic only renders the subset 
          of latex defined by MathJax 
          [here](https://docs.mathjax.org/en/v2.5-latest/tex.html)."""
          display(Latex(cell))
  
      @cell_magic
      def svg(self, line, cell):
          """Render the cell as an SVG literal"""
          display(SVG(cell))
  
      @cell_magic
      def html(self, line, cell):
          """Render the cell as a block of HTML"""
          display(HTML(cell))
  
subject: Clarify that the MathJax comment is Notebook specific.