[clang-tools-extra] [clang-tidy] use upper case letters for bool conversion suffix (PR #102831)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

A bit of nitpick, but would it make sense to have some consistency with `readability-identifier-naming`?

Instead of `UseUpperCase`, I'm thinking of:

`LiteralSuffixCase: LowerCase/UpperCase`

Like I said, not a big deal, I'm just posting as suggestion in case you like it better.

https://github.com/llvm/llvm-project/pull/102831