Add a collapsible section in markdown

markdown-details-collapsible.md

How to add a collapsible section in markdown.

Example

Click me

Some Code

package main

import "fmt"

func mayPanic() {
    panic("a problem")
}

func main() {

    defer func() {
        if r := recover(); r != nil {

            fmt.Println("Recovered. Error:\n", r)
        }
    }()

    mayPanic()

    fmt.Println("After mayPanic()")
}

Code

<details>
  <summary>Click me</summary>
  
  ### Some Code
  ```golang
  package main
  import "fmt"
  func main() {
      fmt.Println("Hello, World!")
  }
  ```
</details>

Rules (If you don't do this, your code may not work)

1. Always have an empty line after the </summary> tag
2. Always have an empty line after each </details> tag