new_contents: #!/usr/bin/env python
  """
  :Author Patrik Valkovic
  :Created 23.06.2017 16:39
  :Licence GNUv3
  Part of grammpy
  
  """
  
  from grammpy import Grammar as _G, Rule as _R, Nonterminal as _N
  
  
  class TFirst:
      pass
  
  
  class TSecond:
      pass
  
  
  class TThird:
      pass
  
  
  TInstFirst = object()
  TInstSecond = object()
  TInstThird = object()
  
  
  class NFirst(_N):
      pass
  
  
  class NSecond(_N):
      pass
  
  
  class NThird(_N):
      pass
  
  
  class NFourth(_N):
      pass
  
  
  class NFifth(_N):
      pass
  
  
  grammar = _G(terminals=[0, 1, 2,
                          'a', 'b', 'c',
                          TFirst, TSecond, TThird,
                          TInstFirst, TInstSecond, TInstThird],
               nonterminals=[NFifth, NSecond, NThird, NFourth, NFifth])
  
subject: Add valid grammar into tests of rules