fix small typo and broken link (#1958)

# What does this PR do?

Fix a typo; fix a broken link; add one sentence in the guidance docs to
make the word "grammar" less abstract


## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [ ] Did you read the [contributor
guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the
[forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes?
Here are the
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and
[here are tips on formatting
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- [ ] Did you write any new necessary tests?


## Who can review?

Anyone in the community is free to review the PR once the tests have
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@drbh

docs/source/basic_tutorials/train_medusa.md

@@ -1,6 +1,6 @@
 # Train Medusa
 
-This tutorial will show you how to train a Medusa model on a dataset of your choice. Please check out the [speculation documentation](../conceptual/speculation.md) for more information on how Medusa works and speculation in general.
+This tutorial will show you how to train a Medusa model on a dataset of your choice. Please check out the [speculation documentation](../conceptual/speculation) for more information on how Medusa works and speculation in general.
 
 ## What are the benefits of training a Medusa model?
 

docs/source/conceptual/guidance.md

@@ -2,11 +2,11 @@
 
 ## What is Guidance?
 
-Guidance is a feature that allows users to constrain the generation of a large language model with a specified grammar. This feature is particularly useful when you want to generate text that follows a specific structure or uses a specific set of words or produce output in a specific format.
+Guidance is a feature that allows users to constrain the generation of a large language model with a specified grammar. This feature is particularly useful when you want to generate text that follows a specific structure or uses a specific set of words or produce output in a specific format. A prominent example is JSON grammar, where the model is forced to output valid JSON.  
 
 ## How is it used?
 
-Guidance can be in many ways and the community is always finding new ways to use it. Here are some examples of how you can use guidance:
+Guidance can be implemented in many ways and the community is always finding new ways to use it. Here are some examples of how you can use guidance:
 
 Technically, guidance can be used to generate: