tweak: return format! string directly

cosmic-theme/src/output/qt_output.rs

@@ -17,8 +17,6 @@ impl Theme {
     /// Some high-level documentation for this file can be found at:
     /// https://web.archive.org/web/20250402234329/https://docs.kde.org/stable5/en/plasma-workspace/kcontrol/colors/
     pub fn as_qt(&self) -> String {
-        let mut output = "# GENERATED BY COSMIC\n".to_string();
-
         // Usually, disabled elements will have strongly reduced contrast and are often notably darker or lighter
         let disabled_color_effects = IniColorEffects {
             color: self.button.disabled,
@@ -120,8 +118,9 @@ impl Theme {
 
         let light_or_dark = if self.is_dark { "Dark" } else { "Light" };
 
-        output.push_str(&format!(
-            r#"
+        format!(
+            r#"# GENERATED BY COSMIC
+
 [ColorEffects:Disabled]
 {}
 
@@ -176,9 +175,7 @@ contrast=4
             format_ini_colors(&view_colors, bg),
             format_ini_colors(&window_colors, bg),
             format_ini_wm_colors(&view_colors, self.is_dark),
-        ));
-
-        output
+        )
     }
 
     /// Write the color scheme to the appropriate directory.