[clang] [clang-format] Add space after a word token (PR #92741)

[Robin Caloudis via cfe-commits]

robincaloudis wrote:

Even though this PR gives us the correct behavior, I do not think it is good. 

Since I am by no means an expert on Clang, a few questions arose
* Why is `xor` tokenized as unary operator even though it's a word token in C?
* How to properly distinguish between keyword difference in the C and C++ language? 

https://github.com/llvm/llvm-project/pull/92741