old_contents: #from http://rosettacode.org/wiki/Range_extraction#Python
  #pythran export test_range_extract(int list list)
  #runas test_range_extract([[-8, -7, -6, -3, -2, -1, 0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 14, 15, 17, 18, 19, 20], [0, 1, 2, 4, 6, 7, 8, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39]])
  
  def range_extract(lst):
      'Yield 2-tuple ranges or 1-tuple single elements from list of increasing ints'
      lenlst = len(lst)
      i = 0
      while i< lenlst:
          low = lst[i]
          while i <lenlst-1 and lst[i]+1 == lst[i+1]: i +=1
          hi = lst[i]
          if   hi - low >= 2:
              yield [low, hi]
          elif hi - low == 1:
              yield [low]
              yield [hi]
          else:
              yield [low]
          i += 1
  
  def test_range_extract(on):
      return [range_extract(i) for i in on]
  
new_contents: #from http://rosettacode.org/wiki/Range_extraction#Python
  #pythran export test_range_extract(int list list)
  #runas test_range_extract([[-8, -7, -6, -3, -2, -1, 0, 1, 3, 4, 5, 7, 8, 9, 10, 11, 14, 15, 17, 18, 19, 20], [0, 1, 2, 4, 6, 7, 8, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39]])
  
  def range_extract(lst):
      'Yield 2-tuple ranges or 1-tuple single elements from list of increasing ints'
      lenlst = len(lst)
      i = 0
      while i< lenlst:
          low = lst[i]
          while i <lenlst-1 and lst[i]+1 == lst[i+1]: i +=1
          hi = lst[i]
          if   hi - low >= 2:
              yield [low, hi]
          elif hi - low == 1:
              yield [low]
              yield [hi]
          else:
              yield [low]
          i += 1
  
  def test_range_extract(on):
      return [list(range_extract(i)) for i in on]
  
subject: Fix rangeextract test case