Fix: small edits to type hint section

Update documentation/write-user-documentation/document-your-code-api-docstrings.md

Update documentation/write-user-documentation/document-your-code-api-docstrings.md

Update documentation/write-user-documentation/document-your-code-api-docstrings.md

Update documentation/write-user-documentation/document-your-code-api-docstrings.md

Update documentation/write-user-documentation/document-your-code-api-docstrings.md

Edits to type hint section

Author: lwasser