more updated/improvements

Author: denrase

docs/platforms/dart/integrations/dio.mdx

@@ -58,18 +58,10 @@ final response = await dio.get<String>('https://wrong-url.dev/');
 This is an opt-out feature. The following example shows how to disable it:
 
 
-```dart
-import 'package:sentry/sentry.dart';
-
-Future<void> main() async {
-  await Sentry.init(
-    (options) {
-      options.dsn = '___PUBLIC_DSN___';
-      options.captureFailedRequests = false;
-    },
-    appRunner: initApp, // Init your App.
-  );
-}
+```dart {2}
+await Sentry.init((options) {
+  options.captureFailedRequests = false;
+});
 ```
 
 ## Tracing for HTTP Requests

docs/platforms/flutter/session-replay/index.mdx

@@ -32,14 +32,11 @@ dependencies:
 To set up the integration, add the following to your Sentry initialization:
 
 ```dart
-await SentryFlutter.init(
-  (options) {
-    ...
-    options.experimental.replay.sessionSampleRate = 1.0;
-    options.experimental.replay.onErrorSampleRate = 1.0;
-  },
-  appRunner: () => runApp(MyApp()),
-);
+await SentryFlutter.init((options) {
+  ...
+  options.experimental.replay.sessionSampleRate = 1.0;
+  options.experimental.replay.onErrorSampleRate = 1.0;
+});
 ```
 
 ## Verify

platform-includes/enriching-events/attachment-upload/dart.mdx

@@ -4,6 +4,6 @@ import 'package:sentry/sentry.dart';
 final attachment = SentryAttachment.fromByteData(bytedata);
 
 Sentry.configureScope((scope) {
-    scope.addAttachment(attachment);
+  scope.addAttachment(attachment);
 });
 ```

platform-includes/enriching-events/breadcrumbs/before-breadcrumb/flutter.mdx

@@ -1,4 +1,4 @@
-```dart {4}
+```dart {3}
 await SentryFlutter.init((options) {
   options.beforeBreadcrumb = (breadcrumb, hint) {
     return 'a.spammy.Logger' == breadcrumb.category ? null : breadcrumb;

platform-includes/performance/traces-sample-rate/dart.mdx

@@ -1,5 +1,5 @@
-```dart
-Sentry.init((options) {
+```dart {2}
+await Sentry.init((options) {
   options.tracesSampleRate = 0.2;
 });
 ```

platform-includes/performance/traces-sample-rate/flutter.mdx

@@ -1,5 +1,5 @@
 ```dart {2}
-SentryFlutter.init((options) => {
+await SentryFlutter.init((options) => {
   options.tracesSampleRate = 0.2;
 });
 ```

platform-includes/performance/traces-sampler-as-filter/dart.mdx

@@ -1,6 +1,4 @@
 ```dart
-import 'package:sentry/sentry.dart';
-
 await Sentry.init((options) {
   // Determine traces sample rate based on the sampling context
   options.tracesSampler = (samplingContext) {

platform-includes/performance/traces-sampler-as-sampler/flutter.mdx

@@ -1,5 +1,5 @@
 ```dart
-SentryFlutter.init((options) {
+await SentryFlutter.init((options) {
   // Determine traces sample rate based on the sampling context
   options.tracesSampler = (samplingContext) {
     final ctx = samplingContext.customSamplingContext;