Can't run `make amalgamate`

[ss]

Description

Any attempt to run make amalgamate ends with:

astyle \
    --style=allman \
    --indent=spaces=4 \
    --indent-modifiers \
    --indent-switches \
    --indent-preproc-block \
    --indent-preproc-define \
    --indent-col1-comments \
    --pad-oper \
    --pad-header \
    --align-pointer=type \
    --align-reference=type \
    --add-braces \
    --squeeze-lines=2 \
    --convert-tabs \
    --close-templates \
    --lineend=linux \
    --preserve-date \
    --suffix=none \
    --formatted \
   include/nlohmann/adl_serializer.hpp include/nlohmann/byte_container_with_subtype.hpp include/nlohmann/detail/abi_macros.hpp include/nlohmann/detail/conversions/from_json.hpp include/nlohmann/detail/conversions/to_chars.hpp include/nlohmann/detail/conversions/to_json.hpp include/nlohmann/detail/exceptions.hpp include/nlohmann/detail/hash.hpp include/nlohmann/detail/input/binary_reader.hpp include/nlohmann/detail/input/input_adapters.hpp include/nlohmann/detail/input/json_sax.hpp include/nlohmann/detail/input/lexer.hpp include/nlohmann/detail/input/parser.hpp include/nlohmann/detail/input/position_t.hpp include/nlohmann/detail/iterators/internal_iterator.hpp include/nlohmann/detail/iterators/iter_impl.hpp include/nlohmann/detail/iterators/iteration_proxy.hpp include/nlohmann/detail/iterators/iterator_traits.hpp include/nlohmann/detail/iterators/json_reverse_iterator.hpp include/nlohmann/detail/iterators/primitive_iterator.hpp include/nlohmann/detail/json_custom_base_class.hpp include/nlohmann/detail/json_pointer.hpp include/nlohmann/detail/json_ref.hpp include/nlohmann/detail/macro_scope.hpp include/nlohmann/detail/macro_unscope.hpp include/nlohmann/detail/meta/call_std/begin.hpp include/nlohmann/detail/meta/call_std/end.hpp include/nlohmann/detail/meta/cpp_future.hpp include/nlohmann/detail/meta/detected.hpp include/nlohmann/detail/meta/identity_tag.hpp include/nlohmann/detail/meta/is_sax.hpp include/nlohmann/detail/meta/std_fs.hpp include/nlohmann/detail/meta/type_traits.hpp include/nlohmann/detail/meta/void_t.hpp include/nlohmann/detail/output/binary_writer.hpp include/nlohmann/detail/output/output_adapters.hpp include/nlohmann/detail/output/serializer.hpp include/nlohmann/detail/string_concat.hpp include/nlohmann/detail/string_escape.hpp include/nlohmann/detail/value_t.hpp include/nlohmann/json.hpp include/nlohmann/json_fwd.hpp include/nlohmann/ordered_map.hpp include/nlohmann/thirdparty/hedley/hedley.hpp include/nlohmann/thirdparty/hedley/hedley_undef.hpp tests/abi/config/config.hpp tests/abi/config/custom.cpp tests/abi/config/default.cpp tests/abi/config/noversion.cpp tests/abi/diag/diag.cpp tests/abi/diag/diag.hpp tests/abi/diag/diag_off.cpp tests/abi/diag/diag_on.cpp tests/abi/inline_ns/use_current.cpp tests/abi/inline_ns/use_v3_10_5.cpp tests/abi/main.cpp tests/benchmarks/src/benchmarks.cpp tests/cmake_add_subdirectory/project/main.cpp tests/cmake_fetch_content/project/main.cpp tests/cmake_fetch_content2/project/main.cpp tests/cmake_import/project/main.cpp tests/cmake_import_minver/project/main.cpp tests/cmake_target_include_directories/project/Bar.cpp tests/cmake_target_include_directories/project/Bar.hpp tests/cmake_target_include_directories/project/Foo.cpp tests/cmake_target_include_directories/project/Foo.hpp tests/cmake_target_include_directories/project/main.cpp tests/cuda_example/json_cuda.cu tests/src/fuzzer-driver_afl.cpp tests/src/fuzzer-parse_bjdata.cpp tests/src/fuzzer-parse_bson.cpp tests/src/fuzzer-parse_cbor.cpp tests/src/fuzzer-parse_json.cpp tests/src/fuzzer-parse_msgpack.cpp tests/src/fuzzer-parse_ubjson.cpp tests/src/make_test_data_available.hpp tests/src/test_utils.hpp tests/src/unit-32bit.cpp tests/src/unit-algorithms.cpp tests/src/unit-allocator.cpp tests/src/unit-alt-string.cpp tests/src/unit-assert_macro.cpp tests/src/unit-binary_formats.cpp tests/src/unit-bjdata.cpp tests/src/unit-bson.cpp tests/src/unit-byte_container_with_subtype.cpp tests/src/unit-capacity.cpp tests/src/unit-cbor.cpp tests/src/unit-class_const_iterator.cpp tests/src/unit-class_iterator.cpp tests/src/unit-class_lexer.cpp tests/src/unit-class_parser.cpp tests/src/unit-comparison.cpp tests/src/unit-concepts.cpp tests/src/unit-constructor1.cpp tests/src/unit-constructor2.cpp tests/src/unit-convenience.cpp tests/src/unit-conversions.cpp tests/src/unit-custom-base-class.cpp tests/src/unit-deserialization.cpp tests/src/unit-diagnostics.cpp tests/src/unit-disabled_exceptions.cpp tests/src/unit-element_access1.cpp tests/src/unit-element_access2.cpp tests/src/unit-hash.cpp tests/src/unit-inspection.cpp tests/src/unit-items.cpp tests/src/unit-iterators1.cpp tests/src/unit-iterators2.cpp tests/src/unit-json_patch.cpp tests/src/unit-json_pointer.cpp tests/src/unit-large_json.cpp tests/src/unit-merge_patch.cpp tests/src/unit-meta.cpp tests/src/unit-modifiers.cpp tests/src/unit-msgpack.cpp tests/src/unit-no-mem-leak-on-adl-serialize.cpp tests/src/unit-noexcept.cpp tests/src/unit-ordered_json.cpp tests/src/unit-ordered_map.cpp tests/src/unit-pointer_access.cpp tests/src/unit-readme.cpp tests/src/unit-reference_access.cpp tests/src/unit-regression1.cpp tests/src/unit-regression2.cpp tests/src/unit-serialization.cpp tests/src/unit-testsuites.cpp tests/src/unit-to_chars.cpp tests/src/unit-type_traits.cpp tests/src/unit-ubjson.cpp tests/src/unit-udl.cpp tests/src/unit-udt.cpp tests/src/unit-udt_macro.cpp tests/src/unit-unicode1.cpp tests/src/unit-unicode2.cpp tests/src/unit-unicode3.cpp tests/src/unit-unicode4.cpp tests/src/unit-unicode5.cpp tests/src/unit-user_defined_input.cpp tests/src/unit-windows_h.cpp tests/src/unit-wstring.cpp tests/src/unit.cpp single_include/nlohmann/json.hpp single_include/nlohmann/json_fwd.hpp docs/examples/*.cpp
Invalid command line options:
        squeeze-lines=2
For help on options type 'astyle -h'
Artistic Style has terminated

Is some specific astyle version required? My system has astyle v3.1

Reproduction steps

make amalgamate

Expected vs. actual results

Please see the description.

Minimal code example

No response

Error messages

No response

Compiler and operating system

Ubuntu 22.04

Library version

7efe875

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[Niels Lohmann]

The CI uses astyle 3.1. This is my local call:

pretty:
	astyle-3.1 \
	    --style=allman \
	    --indent=spaces=4 \
	    --indent-modifiers \
	    --indent-switches \
	    --indent-preproc-block \
	    --indent-preproc-define \
	    --indent-col1-comments \
	    --pad-oper \
	    --pad-header \
	    --align-pointer=type \
	    --align-reference=type \
	    --add-braces \
	    --convert-tabs \
	    --close-templates \
	    --lineend=linux \
	    --preserve-date \
	    --suffix=none \
	    --formatted \
	   $(SRCS) $(TESTS_SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) docs/examples/*.cpp

I have not found the time to fix this in the CI. Help more than appreciated!