[code] Custom background code color now results in weird code blocks

[stp-ip]

Is this a BUG REPORT or FEATURE REQUEST?:
bug

What happened:
Currently code blocks have 2 different background color shades.

What you expected to happen:
Single background color.

How to reproduce it (as minimally and precisely as possible):
https://about.okkur.org/syna/docs/installation/#using-starter

[mpourismaiel]

Would you please provide more information on the issue? I'm afraid I don't understand.

[stp-ip]

This got fixed.

[stp-ip]

I think this might have been fixed by weird behaviour from Hugo:

With code fencing disabled it doesn't show up:

[markup]
  [markup.highlight]
    codeFences = false

It also doesn't show up, if the code block is embed in "raw" html (that's why assumed it was gone):

<details><summary>Code</summary>
/```
+++
fragment = "content"
weight = 100
+++

Hello world! This is my first blog post.
/```
</details>

It does show up on bare code blocks so:

/```
+++
fragment = "content"
weight = 100
+++

Hello world! This is my first blog post.
/```

Sidenote: Had to escape the codeblocks inside the issue codeblocks ^^

[stp-ip]

We could either remove highlighting by default in our config or remove our own code block coloring. Not sure, if anything else makes more sense so.

[mpourismaiel]

I'm not really sure what would be a better default.

[mpourismaiel]

Please let me know which option you prefer and I can create a PR right away.

[stp-ip]

As discussed remove our specific background for code snippets. The code highlighter is much more elaborate than our coloring, so removing ours in favor feels right.
If one wants to disable the highlighter and add their own coloring, we do have custom CSS.

Not sure we could or should do add our own style, when the hugo highlighter is disabled so.