add missing sample, format samples

Author: denrase

platform-includes/configuration/allow-urls/flutter.mdx

@@ -1,7 +1,7 @@
 ```dart {3}
 await SentryFlutter.init(
-    (options) {
-      options.allowUrls = ["^https://sentry.com.*\$", "my-custom-domain"];
-    },
-  );
+  (options) {
+    options.allowUrls = ["^https://sentry.com.*\$", "my-custom-domain"];
+  },
+);
 ```

platform-includes/configuration/before-send-fingerprint/flutter.mdx

@@ -0,0 +1,14 @@
+```dart {10}
+FutureOr<SentryEvent?> beforeSend(SentryEvent event, Hint hint) async {
+  if (event.throwable is DatabaseException) {
+    event = event.copyWith(fingerprint: ['database-connection-error']);
+  }
+  return event;
+}
+
+await Sentry.init(
+  (options) {
+    options.beforeSend = beforeSend;
+  },
+);
+```

platform-includes/configuration/before-send-hint/flutter.mdx

@@ -1,7 +1,11 @@
-```dart
+```dart {7}
 FutureOr<SentryEvent?> beforeSend(SentryEvent event, Hint hint) async {
   return hint is MyHint ? null : event;
 }
 
-await SentryFlutter.init((options) => options.beforeSend = beforeSend);
+await SentryFlutter.init(
+  (options) {
+    options.beforeSend = beforeSend;
+  },
+);
 ```

platform-includes/configuration/before-send/flutter.mdx

@@ -1,9 +1,13 @@
-```dart
+```dart {9}
 FutureOr<SentryEvent?> beforeSend(SentryEvent event, Hint hint) async {
   // Modify the event here:
   event = event.copyWith(serverName: null); // Don't send server names.
   return event;
 }
 
-await SentryFlutter.init((options) => options.beforeSend = beforeSend);
+await SentryFlutter.init(
+  (options) {
+    options.beforeSend = beforeSend;
+  },
+);
 ```

platform-includes/enriching-events/attach-viewhierarchy/flutter.mdx

@@ -1,14 +1,8 @@
-```dart
-import 'package:flutter/widgets.dart';
-import 'package:sentry_flutter/sentry_flutter.dart';
-
-Future<void> main() async {
-  await SentryFlutter.init(
-    (options) {
-      options.dsn = '___PUBLIC_DSN___';
-      options.attachViewHierarchy = true;
-    },
-    appRunner: () => runApp(MyApp()),
-  );
-}
+```dart {3}
+await SentryFlutter.init(
+  (options) {
+    options.attachViewHierarchy = true;
+  },
+  appRunner: () => runApp(MyApp()),
+);
 ```

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

@@ -0,0 +1,11 @@
+```dart {7}
+Breadcrumb? beforeBreadcrumb(Breadcrumb? breadcrumb, Hint hint) {
+  return 'a.spammy.Logger' == breadcrumb.category ? null : breadcrumb;
+}
+
+await SentryFlutter.init(
+  (options) {
+    options.beforeBreadcrumb = beforeBreadcrumb;
+  },
+);
+```