* 📝 Add docs recommending Union over Optional
* 📝 Update docs recommending Union over Optional
* 📝 Update source examples for docs, recommend Union over Optional
* 📝 Update highlighted lines with updated source examples
* 📝 Update highlighted lines in Markdown with recent code changes
* 📝 Update docs, use Union instead of Optional
* ♻️ Update source examples to recommend Union over Optional
* 🎨 Update highlighted code in Markdown after moving from Optional to Union
* 🔧 Add first pre-commit config
* 🎨 Format YAML files with pre-commit
* 🎨 Format Markdown with pre-commit
* 🎨 Format SVGs, drawio, JS, HTML with pre-commit
* ➕ Add pre-commit to dev dependencies
* ⬇️ Extend pre-commit range to support Python 3.6
* Spanish translation for the tutorial-user-guide index page
* Improve some parts of the text in terms of writing
* Change the wording to keep the documentation consistent.
* 📝 Add small wording and consistency changes
* 🎨 Apply the same consistency changes to EN 🤷
Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>
