correct the input_ids value and batch_sentences value.
I found two places with minor typo in transformers/docs/source/preprocessing.rst. 

First, the example output does not match the input in Base use section. "Hello, I'm a single sentence!" should be mapped to [101, 8667, 117, 146, 112, 182, 170, 1423, 5650, 106, 102] rather than [101, 138, 18696, 155, 1942, 3190, 1144, 1572, 13745, 1104, 159, 9664, 2107, 102] which is the original edition. (A quick check is that they do not match in length) 

Second, the example input does not match the output in the same section. For consistency, I changed the sentence to be identical to the example given above it by adding a comma.
This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md) are likely to be ignored.