[Docs] Fix spelling and grammar mistakes (#28825)

* Fix typos and grammar mistakes in docs and examples

* Fix typos in docstrings and comments

* Fix spelling of `tokenizer` in model tests

* Remove erroneous spaces in decorators

* Remove extra spaces in Markdown link texts

docs/source/en/tasks/idefics.md

@@ -42,7 +42,7 @@ In this guide, you'll learn how to:
   - [Prompted image captioning](#prompted-image-captioning)
   - [Few-shot prompting](#few-shot-prompting)
   - [Visual question answering](#visual-question-answering)
-  - [Image classificaiton](#image-classification)
+  - [Image classification](#image-classification)
   - [Image-guided text generation](#image-guided-text-generation)
 - [Run inference in batch mode](#running-inference-in-batch-mode)
 - [Run IDEFICS instruct for conversational use](#idefics-instruct-for-conversational-use)

docs/source/en/tasks/masked_language_modeling.md

@@ -108,8 +108,7 @@ For masked language modeling, the next step is to load a DistilRoBERTa tokenizer
 >>> tokenizer = AutoTokenizer.from_pretrained("distilroberta-base")
 ```
 
-You'll notice from the example above, the `text` field is actually nested inside `answers`. This means you'll need to e
-xtract the `text` subfield from its nested structure with the [`flatten`](https://huggingface.co/docs/datasets/process#flatten) method:
+You'll notice from the example above, the `text` field is actually nested inside `answers`. This means you'll need to extract the `text` subfield from its nested structure with the [`flatten`](https://huggingface.co/docs/datasets/process#flatten) method:
 
 ```py
 >>> eli5 = eli5.flatten()