Remove trailing spaces

Author: tronical

src/main.cpp

@@ -7,7 +7,7 @@ int main(int argc, char **argv)
     ui->on_request_increase_value([&]{
         ui->set_counter(ui->get_counter() + 1);
     });
-    
+
     ui->run();
     return 0;
 }

ui/appwindow.slint

@@ -3,13 +3,13 @@ import { Button, VerticalBox } from "std-widgets.slint";
 export component AppWindow inherits Window {
     in-out property<int> counter: 42;
     callback request-increase-value();
-    VerticalBox { 
+    VerticalBox {
         Text {
             text: "Counter: \{root.counter}";
         }
         Button {
             text: "Increase value";
-            clicked => { 
+            clicked => {
                 root.request-increase-value();
             }
         }