style: missing empty line at the end of the file added #314

Job	Run time
std::format none C++20 Clang-18 Release	1m 1s
std::format none C++20 Clang-18 Debug	5m 9s
std::format none C++23 Clang-18 Release	58s
std::format none C++23 Clang-18 Debug	4m 39s
std::format gsl-lite C++20 Clang-18 Release	52s
std::format gsl-lite C++20 Clang-18 Debug	4m 25s
std::format gsl-lite C++23 Clang-18 Release	1m 3s
std::format gsl-lite C++23 Clang-18 Debug	5m 2s
std::format ms-gsl C++20 Clang-18 Release	1m 51s
std::format ms-gsl C++20 Clang-18 Debug	5m 18s
std::format ms-gsl C++23 Clang-18 Release	1m 4s
std::format ms-gsl C++23 Clang-18 Debug	4m 59s
fmtlib none C++20 Clang-18 Release	53s
fmtlib none C++20 Clang-18 Debug	3m 56s
fmtlib none C++23 Clang-18 Release	56s
fmtlib none C++23 Clang-18 Debug	2m 44s
fmtlib gsl-lite C++20 Clang-18 Release	1m 0s
fmtlib gsl-lite C++20 Clang-18 Debug	3m 24s
fmtlib gsl-lite C++23 Clang-18 Release	1m 3s
fmtlib gsl-lite C++23 Clang-18 Debug	3m 18s
fmtlib ms-gsl C++20 Clang-18 Release	1m 3s
fmtlib ms-gsl C++20 Clang-18 Debug	4m 7s
fmtlib ms-gsl C++23 Clang-18 Release	59s
fmtlib ms-gsl C++23 Clang-18 Debug	3m 40s
	1h 3m 24s

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