Code formatting mostly is a solved issue. Configure a tool like clang-format/uncrustify, and make it run automatically by your test scripts. We've been doing

Code formatting mostly is a solved issue. Configure a tool like clang-format/uncrustify, and make it run automatically by your test scripts. We've been doing this at work for years, and I'm still amazed at the results: nobody cares about the coding style anymore, and the code is perfectly homogenous (and the logs/diffs are 99% clean from formatting concerns).