[doc] Fix broken snippet that had too many quotes
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_The documentation is not available anymore as the PR was closed or merged._
2022-09-16T12:59:21Z
https://github.com/huggingface/datasets/pull/4986#issuecomment-1249336692
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2022-09-16T17:34:52Z
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MEMBER
Spent the day familiarising myself with the huggingface line of products, and happened to run into some small issues here and there. Magically, I've found exactly one small issue in `transformers`, one in `accelerate` and now one in `datasets`, hah!

As for this PR, the issue seems solved according to the [new PR documentation](https://moon-ci-docs.huggingface.co/docs/datasets/pr_4986/en/process#map):
![image](https://user-images.githubusercontent.com/37621491/190646405-6afa06fa-9eac-48f6-ab30-2677944fb7b6.png)

2022-09-16T13:11:11Z
https://github.com/huggingface/datasets/pull/4986#issuecomment-1249348305
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2022-09-16T13:11:11Z
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Hello!

### Pull request overview
* Fix broken snippet in https://huggingface.co/docs/datasets/main/en/process that has too many quotes

### Details
The snippet in question can be found here: https://huggingface.co/docs/datasets/main/en/process#map
This screenshot shows the issue, there is a quote too many, causing the snippet to be colored incorrectly:
![image](https://user-images.githubusercontent.com/37621491/190640627-f7587362-0e44-4464-a5d1-a0b98df6986f.png)

The change speaks for itself.

Thank you for the detailed documentation, by the way. 

- Tom Aarsen
