fix get_pairs()

src/main.cpp

@@ -9,8 +9,6 @@ int main() {
 	std::string_view raw_input{"a=5\nb=10\n23=c"};
 	std::filesystem::path filename{"test/test.ini"};
 
-	std::unordered_map<std::string, std::string> map = pin.get_pairs();
-
 	std::cout << std::boolalpha << pin.load_file(filename) << "\n";
 	std::cout << "attack: " << pin.get_uint32("attack ") << "\n";
 	std::cout << "def " << pin.get_uint64("def ") << "\n";

src/pini.cpp

@@ -8,10 +8,8 @@
 
 namespace pn {
 namespace {
-
 pini::map_type read_file(std::filesystem::path const& filename) {
 	std::vector<std::string> lines = util::get_lines(filename);
-
 	return util::insert_pairs(lines);
 }
 

src/pini.hpp

@@ -13,7 +13,7 @@ class pini {
   public:
 	using map_type = std::unordered_map<std::string, std::string>;
 
-	map_type get_pairs() { return key_value_pairs; }
+	const map_type& get_pairs() const { return key_value_pairs; }
 	bool load_file(std::filesystem::path const& filename);
 	bool load_text(std::string_view text);