docs: def latexify_n2col(x, nplaces=None, **kwargs):
      """Render a number into LaTeX in a 2-column format, where the columns split
      immediately to the left of the decimal point. This gives nice alignment of
      numbers in a table.
  
      """
      if nplaces is not None:
          t = '%.*f' % (nplaces, x)
      else:
          t = '%f' % x
  
      if '.' not in t:
          return '$%s$ &' % t
  
      left, right = t.split('.')
      return '$%s$ & $.%s$' % (left, right)