message: Don't clang-format *.pb.* files.
  These are auto-generated.  Prefer not to autoformat autogenerated files
  so that you can regenerate the files and easily tell whether they've
  changed.
diff: @@ -5,10 +5,14 @@ repos:
  - id: clang-format
  name: clang-format C++
  types: [c++]
  + # Don't autoformat autogenerated proto *.pb.cpp files.
  + exclude: '\.pb\.'
  - id: clang-format
  name: clang-format C
  types: [c]
  exclude_types: [c++]
  + # Don't autoformat autogenerated proto *.pb.c files.
  + exclude: '\.pb\.'
  - id: clang-format
  name: clang-format protobuf
  types: [proto]
  