new_contents: from .base_executor import CompiledExecutor
  
  class Executor(CompiledExecutor):
      ext = '.nim'
      name = 'NIM'
      command = 'nim'
      test_program = '''\
  echo readLine(stdin)
  '''
  
      def get_compile_args(self):
          return [self.get_command(), 'c', '--verbosity:0', self._code]
  
subject: Add Nim executor; #200