fixed unnecessary blank line in output when not verbose

src/main.cpp

@@ -162,10 +162,11 @@ int main(int argc, const char * argv[]) {
                 std::cerr << '\r' << cur_iter - prev_iter << " iterations per second, " << cur_iter << " total        ";
             }
             worker.join();
+            std::cout << '\n';
         } else {
             robinsonizer.run();
         }
-        std::cout << '\n' << robinsonizer << '\n';
+        std::cout << robinsonizer << '\n';
 
     } catch (const std::exception& ex) {
         std::cerr << "autogram: " << ex.what() << '\n';