code: def escape(s, fold_newlines=True):
      
  
      def sub(m):
          c = m.group()
          if c in CHAR_ESCAPE:
              return CHAR_ESCAPE[c]
  
          if c.isspace():
              if fold_newlines:
                  return r'\\'
              return r'\\[{}\baselineskip]'.format(len(c))
  
      return ESCAPE_RE.sub(sub, s)
docs: Escapes a string to make it usable in LaTeX text mode. Will replace
      special characters as well as newlines.
  
      Some problematic characters like ``[`` and ``]`` are escaped into groups
      (e.g. ``{[}``), because they tend to cause problems when mixed with ``\\``
      newlines otherwise.
  
      :param s: The string to escape.
      :param fold_newlines: If true, multiple newlines will be reduced to just a
                            single ``\\``. Otherwise, whitespace is kept intact
                            by adding multiple ``[n\baselineskip]``.