go-term-markdown/testdata_source/codeblock.md

Here is a piece of code:

package main

import "fmt"

func main() {
	fmt.Println("Hello world")
}

Another one, tagged as well with the language name

#include <stdio.h>
int main()
{
   printf("Hello, World!");
   return 0;
}

This one is not:

#include <stdio.h>
int main()
{
   printf("Hello, World!");
   return 0;
}