More clippy fixes

objdiff-gui/src/app.rs

@@ -542,7 +542,7 @@ impl App {
                 Ok(()) => state.config_error = None,
                 Err(e) => {
                     log::error!("Failed to load project config: {e}");
-                    state.config_error = Some(format!("{e}"));
+                    state.config_error = Some(e.to_string());
                 }
             }
         }

objdiff-gui/src/views/config.rs

@@ -808,7 +808,7 @@ fn split_obj_config_ui(
     for (idx, glob) in state.config.watch_patterns.iter().enumerate() {
         ui.horizontal(|ui| {
             ui.label(
-                RichText::new(format!("{glob}"))
+                RichText::new(glob.to_string())
                     .color(appearance.text_color)
                     .family(FontFamily::Monospace),
             );