Test for detail and summary
Markdown in details
* content 1
* content 2
* content 3
* content 4
* content 5
HTML in details
- content 1
- content 2
- content 3
- content 4
- content 5
Shopping list
* Vegetables
* Fruits
* Fish
Tips for collapsed sections
### You can add a header
You can add text within a collapsed section.
You can add an image or a code block, too.
```ruby
puts "Hello World"
```