Code block declaration is not same as GitHub Markdown

[yousefmarey12]

Hello,

I was working on a different open source repo with this particular issue. Basically what I noticed on common markdown processors is that whenever there is N ticks or tildes, there has to be N or more closing ticks or tildes`. From a brief look at code block functions

I noticed that the code only takes into consideration of exactly 3 backticks or tildes. I could be wrong, but I noticed on my side and on the issuer's side that there's a bug when one uses more than 3 ticks.

I couldn't find anything official regarding markdown specifications but what I noticed is that the only way to close a code block is with N or more backticks or tildes. With that said, what I expect to be is as follows:

N backticks (or tildes) should be enclosed with N or more backticks or (tildes). Backticks should not be showed in a UI, even if the number of enclosing backticks is greater than the number of opening backticks.

so

`````

```js

```

``````

The outer backticks will not be visible when parsed, but the inner backticks will be visible as 3 is less than 5.