Test backticks markdown

Test_backticks.md

In case one wants to include backticks in code, need to surround with longer surrounding backticks: https://daringfireball.net/projects/markdown/syntax#code

Test code:

code
code
code

Test code:

```
code
code
code
```

Test code:

````
```
code
code
code
```
````

Test code:

`````
````
```
code
code
code
```
````
`````

credits:

Thanks https://stackoverflow.com/a/25943045/544721 for pointing my attention to this part of Markdown specification!