Inline log format args (#7600)

crates/eframe/src/web/events.rs

@@ -998,7 +998,10 @@ fn install_drag_and_drop(runner_ref: &WebRunner, target: &EventTarget) -> Result
                                         }
                                     }
                                     Err(err) => {
-                                        log::error!("Failed to read file: {:?}", err);
+                                        log::error!(
+                                            "Failed to read file: {}",
+                                            string_from_js_value(&err)
+                                        );
                                     }
                                 }
                             };