message: Review update:
  extend documentation to cover dummy hook
diff: @@ -17,9 +17,11 @@ Ginkgo adds the following additional switches to control what is being built:
  * `-DGINKGO_DEVEL_TOOLS={ON, OFF}` sets up the build system for development
  (requires clang-format, will also download git-cmake-format),
  - default is `OFF`. If it is set to `ON`, a pre-commit hook for formatting
  - will be installed. This hook may overwrite a user defined pre-commit hook
  - when Ginkgo is used as a submodule.
  + default is `OFF`. The default behavior installs a pre-commit hook, which
  + disables git commits. If it is set to `ON`, a new pre-commit hook for
  + formatting will be installed (enabling commits again). In both cases the
  + hook may overwrite a user defined pre-commit hook when Ginkgo is used as
  + a submodule.
  * `-DGINKGO_MIXED_PRECISION={ON, OFF}` compiles true mixed-precision kernels
  instead of converting data on the fly, default is `OFF`.
  Enabling this flag increases the library size, but improves performance of
  