Fixes typos, formatting, and other doc related issues

[rachfop]

This PR addresses some of the following issues in the docs:

Adds space between headings and paragraphs.
Fixes “All of the” to just “All of”
Removes extra white space
Changes “vary” to “varies”
Removes duplicated word `the`
Correct syntax for the word `however`

This is purely a grammatical issue and does not attempt to correct anything technical.

Tests

Ran Mkdocs locally and checked all changes.

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Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 30, 2023 9:26pm

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