message: Now that we have a .clang-format, use that file as reference.
  Previously, we choose a particular clang-format built-in style
  ('Google'), but since we now have a .clang-format configuration file
  use that instead to make sure we always apply the same rules.
  Issues
diff: FORMAT_OUT=${TMPDIR:-/tmp}/clang-format-diff.out
  # Run on all the files that are affected
  -clang-format -i --style=Google $(git diff --name-only --diff-filter=AM -r origin/master | grep '\(\.cc\|\.h\)$')
  +clang-format -i --style=file $(git diff --name-only --diff-filter=AM -r origin/master | grep '\(\.cc\|\.h\)$') 2> /dev/null
  # Check if we got any diff
  git diff > ${FORMAT_OUT}
  if [ -s ${FORMAT_OUT} ]; then
  echo "Style not matching (see https://github.com/google/verible/blob/master/CONTRIBUTING.md#style)"
  - echo "On your *.h, *.cc files, please run clang-format -i --style=Google"
  + echo "On your *.h, *.cc files, please run clang-format -i --style=file <your changed files>"
  cat ${FORMAT_OUT}
  exit 1
  fi
  