git-clang-format uses non-standard-style CLI options

[magic-akari]

I am developing the WASM version of clang-format and testing the CLI that comes with it. (https://github.com/wasm-fmt/clang-format)
I've encountered issues with the non-standard CLI options generated by git-clang-format, which complicates the parsing process.

Typically, clang-format's CLI options are structured as follows:

-i                             - Inplace edit <file>s, if specified.
--style=<string>               - Set coding style.

This is a standard CLI option, with a single hyphen representing a short option and a double hyphen representing a long option. However, CLI options generated by git-clang-format appear differently:

llvm-project/clang/tools/clang-format/git-clang-format

Line 502 in 73c72f2

clang_format_cmd.extend(['-style='+style])

In typical cli parsing libraries, the -style option is synonymous with -s -t -y -l -e, which has been a source of confusion for me.