docs: def merge_dicts(*dicts, **copy_check):
      '''
      Combines dictionaries into a single dictionary. If the 'copy' keyword is passed
      then the first dictionary is copied before update.
  
      merge_dicts({'a': 1, 'c': 1}, {'a': 2, 'b': 1})
      # => {'a': 2, 'b': 1, 'c': 1}
      '''
      merged = {}
      if not dicts:
          return merged
      for index, merge_dict in enumerate(dicts):
          if index == 0 and not copy_check.get('copy'):
              merged = merge_dict
          else:
              merged.update(merge_dict)
      return merged