CLI11/CONTRIBUTING.md

A few notes on contributions

If you want to add code, please make sure it passes the clang-format style (I am using LLVM 4.0):

git ls-files -- '.cpp' '.hpp' | xargs clang-format -i -style=file

It is also a good idea to check this with clang-tidy; automatic fixes can be made using -DCLANG_TIDY_FIX-ON (resets to OFF when rerunning CMake).