Method group_command

src/command/command.cpp:560–564

    for(auto& entry: entries) {
        auto [it, inserted] = group_indices.try_emplace(entry.info.ptr, result.size());
        if(inserted) {
            result.push_back({{}, build_command(entry.file, entry.info, options), entry.info});
        }

        auto& file_ids = result[it->second].file_ids;
        if(file_ids.empty() || file_ids.back() != entry.file) {
            file_ids.push_back(entry.file);
        }