Meta: Do not warn user about too modern clang-format

To prevent warnings for users of varying distributions, do not warn the
user if the clang-version is higher than the expected version.

Meta/lint-clang-format.sh

@@ -31,13 +31,13 @@ if (( ${#files[@]} )); then
  CLANG_FORMAT=clang-format-11
  elif command -v clang-format >/dev/null 2>&1 ; then
  CLANG_FORMAT=clang-format
- if ! "${CLANG_FORMAT}" --version | grep -qF ' 11.' ; then
- echo "You are using '$("${CLANG_FORMAT}" --version)', which appears to not be clang-format 11."
+ if ! "${CLANG_FORMAT}" --version | awk '{ if (substr($NF, 1, index($NF, ".") - 1) < 11) exit 1; }'; then
+ echo "You are using '$("${CLANG_FORMAT}" --version)', which appears to not be clang-format 11 or later."
  echo "It is very likely that the resulting changes are not what you wanted."
  fi
  else
  echo "clang-format-11 is not available, but C or C++ files need linting! Either skip this script, or install clang-format-11."
- echo "(If you install a package 'clang-format', please make sure it's version 11.)"
+ echo "(If you install a package 'clang-format', please make sure it's version 11 or later.)"
  exit 1
  fi