message: Remove --check from rustfmt invocation
diff: @@ -31,7 +31,7 @@ trap 'rm -f "$tmp"' ERR EXIT
  for f in "${files[@]}"; do
  if [[ "${f##*.}" == "rs" ]]; then
  git show :"$f" > "$tmp"
  - if ! cat "$tmp" | rustfmt --check | diff -q "$tmp" - >/dev/null; then
  + if ! cat "$tmp" | rustfmt | diff -q "$tmp" - >/dev/null; then
  [ "$err" -eq 0 ] && echo "Formatting errors found in:" 1>&2
  echo " $f" 1>&2
  err=1
  