code: def or_terms(*args):
      
      args = [arg if not isinstance(arg, list) else ' '.join(arg) for arg in args]
      return '{{{0}}}'.format(' '.join(args))
docs: Connect given term strings or list(s) of term strings with a OR operator for querying.
  
          Args:
              An arbitrary number of either strings or lists of strings representing query terms.
  
          Returns
              A query string consisting of argument terms or'ed together.