[clang] No spaces after colon and comma in initializer list (PR #190657)

[Björn Schäpers via cfe-commits]

https://github.com/HazardyKnusperkeks commented:

> Oh, I seem to have misunderstood the word "style" in the context of clang-format. I took it to mean a concrete built-in style, like LLVM, Google, Chromium, Mozilla, WebKit...
> 
> Am I wrong?

It's not talking about a new style, but a new style option, and that is what you want to add.

https://github.com/llvm/llvm-project/pull/190657