new_contents: import io
  import nose.tools as nt
  from nose.tools import nottest
  
  from converters import latex_transformer
  lt = latex_transformer.LatexTransformer()
  lt.enabled = True
  
  @nottest
  def test_space(input, reference):
      nt.assert_equal(lt.remove_math_space(input),reference)
      
  
  
  def test_evens():
      references = [
              ('$e$','$e$'),
              ('$ e $','$e$'),
              ('xxx$e^i$yyy','xxx$e^i$yyy'),
              ('xxx$ e^i $yyy','xxx$e^i$yyy'),
              ('xxx$e^i $yyy','xxx$e^i$yyy'),
              ('xxx$ e^i$yyy','xxx$e^i$yyy'),
              ('\$ e $ e $','\$ e $e$'),
              ]
  
      for k,v in references :
          yield test_space, k,v
  
subject: add test for transformer latex