Using StackOverflow markdown as an example:

this_is_a_very_long_line_111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

In my case the markdown is rendered by Github, here is a snippet:

<details>
<summary>MethodsCallingMe</summary><blockquote>

<details>
<summary><a href="...">Some Text</a></summary>


- Some_long_text_1
</details>

<details>
<summary><a href="...">Some Text</a></summary>


- Some_long_text_2
</details>

<details>
<summary><a href="...">Some Text</a></summary>


- Some_long_text_3
</details>

</blockquote></details>

I am forced to use <blockquote> because I want to nest collapsible details with indentation and I could not find any other way. But then long lines get wrapped and I do not want it.

Here is how it looks like rendered (after obfuscation):

Notice one of the lines is wrapped. How can I prevent it from happening? Ideally with a horizontal scrollbar.