message: Use a separately installed clang-format if the user has explicitly installed one.
  This enables an easier escape hatch for vcpkg developers not in exactly the same VS update as vcpkg's CI.
diff: @@ -420,7 +420,7 @@ endif()
  # === Target: format ===
  -find_program(CLANG_FORMAT clang-format)
  +find_program(CLANG_FORMAT clang-format PATHS "$ENV{PROGRAMFILES}/LLVM/bin")
  if(CLANG_FORMAT)
  # doing all of these formats in one line has a tendency to overflow the command line length
  add_custom_target(format
  