Formatting: Run clang-format

From Makefile: make fix

src/main.cpp

@@ -355,7 +355,7 @@ int main(void) {
     if (hsi_history.empty()) {
         get_hsi(stocks_list, hsi_history);
     }
-    
+
     // Done loading/creating a new file.
     std::cout << "Current trading fees are charged at " << trading_fees_percent * 100
               << " %" << std::endl;