lit.site.cfg.in

At the top of llvm/test/lit.site.cfg.in (as well as
clang/test/lit.site.congif.in), there is the following comment:

## Autogenerated by LLVM/Clang configuration.
# Do not edit!

This is true for the lit.site.cfg that is generated from
lit.site.cfg.in, but not lit.site.cfg.in itself, correct?