Method go_back

src/toml.hpp:13239–13246

		}

		void go_back(size_t count = 1) noexcept
		{
			return_if_error();
			TOML_ASSERT_ASSUME(count);

			cp		 = reader.step_back(count);
			prev_pos = cp->position;
		}

		void advance()
		{