include: make header guards more sane The C++ standard[1] says: Each identifier that contains a double underscore __ or begins with an underscore followed by an uppercase letter is reserved to the implementation for any use. [1]: https://timsong-cpp.github.io/cppwp/n4659/lex.name#3.1

#ifndef MINORI_CORE_ANIME_SEASON_DB_H_
#define MINORI_CORE_ANIME_SEASON_DB_H_

#include "core/anime.h"
#include "core/date.h"

namespace Anime::Season {

std::vector<int> GetAllAnimeForSeason(SeriesSeason season, Date::Year year);

}

#endif // MINORI_CORE_ANIME_SEASON_DB_H_