old_contents: """Latex filters.
  
  Module of useful filters for processing Latex within Jinja latex templates.
  """
  #-----------------------------------------------------------------------------
  # Copyright (c) 2013, 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
  #-----------------------------------------------------------------------------
  import re
  
  #-----------------------------------------------------------------------------
  # Globals and constants
  #-----------------------------------------------------------------------------
  
  LATEX_RE_SUBS = (
      (re.compile(r'\.\.\.+'), r'\\ldots'),
  )
  
  # Latex substitutions for escaping latex.
  # see: http://stackoverflow.com/questions/16259923/how-can-i-escape-latex-special-characters-inside-django-templates
  
  LATEX_SUBS = {
      '&':  r'\&',
      '%':  r'\%',
      '$':  r'\$',
      '#':  r'\#',
      '_':  r'\_',
      '{':  r'\{',
      '}':  r'\}',
      '~':  r'\textasciitilde{}',
      '^':  r'\^{}',
      '\\': r'\textbackslash{}',
  }
  
  
  #-----------------------------------------------------------------------------
  # Functions
  #-----------------------------------------------------------------------------
  
  __all__ = ['escape_latex']
  
  def escape_latex(text):
      """
      Escape characters that may conflict with latex.
  
      Parameters
      ----------
      text : str
          Text containing characters that may conflict with Latex
      """
      text = ''.join(LATEX_SUBS.get(c, c) for c in text)
      for pattern, replacement in LATEX_RE_SUBS:
          text = pattern.sub(replacement, text)
  
      return text
  
  
new_contents: """Latex filters.
  
  Module of useful filters for processing Latex within Jinja latex templates.
  """
  #-----------------------------------------------------------------------------
  # Copyright (c) 2013, 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
  #-----------------------------------------------------------------------------
  import re
  
  #-----------------------------------------------------------------------------
  # Globals and constants
  #-----------------------------------------------------------------------------
  
  MARKDOWN_IMAGE_RE = re.compile(r'!\[(?P<caption>.*?)\]\(/?files/(?P<location>.*?)\)')
  
  LATEX_RE_SUBS = (
      (re.compile(r'\.\.\.+'), r'\\ldots'),
  )
  
  # Latex substitutions for escaping latex.
  # see: http://stackoverflow.com/questions/16259923/how-can-i-escape-latex-special-characters-inside-django-templates
  
  LATEX_SUBS = {
      '&':  r'\&',
      '%':  r'\%',
      '$':  r'\$',
      '#':  r'\#',
      '_':  r'\_',
      '{':  r'\{',
      '}':  r'\}',
      '~':  r'\textasciitilde{}',
      '^':  r'\^{}',
      '\\': r'\textbackslash{}',
  }
  
  
  #-----------------------------------------------------------------------------
  # Functions
  #-----------------------------------------------------------------------------
  
  __all__ = ['escape_latex', 
             'strip_url_static_file_prefix']
  
  def escape_latex(text):
      """
      Escape characters that may conflict with latex.
  
      Parameters
      ----------
      text : str
          Text containing characters that may conflict with Latex
      """
      text = ''.join(LATEX_SUBS.get(c, c) for c in text)
      for pattern, replacement in LATEX_RE_SUBS:
          text = pattern.sub(replacement, text)
  
      return text
  
  
  def strip_url_static_file_prefix(text):
      text = MARKDOWN_IMAGE_RE.sub(r'![\1](\2)', text)
      return text
  
      
  
subject: Add strip_url_static_file_prefix to filters