[clang] [clang][Diagnostics] Highlight code snippets (PR #66514)

[Timm Baeder via cfe-commits]

Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>,
Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>
Message-ID:
In-Reply-To: <llvm/llvm-project/pull/66514/clang at github.com>


tbaederr wrote:

![Screenshot from 2023-09-20 18-10-28](https://github.com/llvm/llvm-project/assets/49720664/461236ba-1075-4190-a3b8-4230db4cf096)

I wanted to dim the comments a little but that's hard when you don't know the background color and can't select grey :/ 

What are the opinions on blue/yellow/green?

https://github.com/llvm/llvm-project/pull/66514