Space before first line of markdown code.

Why when i use the code markdown there's always a space/indent for the first line of code?

Instead of:

``yum install composer
composer
composer create-project flarum/flarum . --stability=beta``

you should write:

```
yum install composer
composer
composer create-project flarum/flarum . --stability=beta
```

So tripple backticks, new line, code, new line, tripple backticks. Especially the new line before the finishing backticks is important.