new_contents: from numba import *
  import unittest
  
  class TestRedefine(unittest.TestCase):
      def test_redefine(self):
  
          def foo(x):
              return x + 1
  
          jfoo = jit(int32(int32))(foo)
  
          # Test original function
          self.assertTrue(jfoo(1), 2)
  
  
          jfoo = jit(int32(int32))(foo)
  
          # Test re-compiliation
          self.assertTrue(jfoo(2), 3)
  
          def foo(x):
              return x + 2
  
          jfoo = jit(int32(int32))(foo)
  
          # Test redefinition
          self.assertTrue(jfoo(1), 3)
  
subject: Add test for function re-definition