Update sdk constraints and deps for 3.8 (#6600)

Author: parlough

examples/analysis/pubspec.yaml

@@ -3,7 +3,7 @@ description: dart.dev example code.
 
 resolution: workspace
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.8.0-0
 
 dependencies:
   examples_util: {path: ../util}

examples/analysis_alt/pubspec.yaml

@@ -3,4 +3,4 @@ description: dart.dev example code.
 
 resolution: workspace
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.8.0-0

examples/analysis_options.yaml

@@ -21,12 +21,14 @@ linter:
     - prefer_single_quotes
     - sort_child_properties_last
     - sort_unnamed_constructors_first
+    - strict_top_level_inference
     - test_types_in_equals
     - throw_in_finally
     - type_annotate_public_apis
     - unawaited_futures
     - unnecessary_breaks
     - unnecessary_library_directive
     - unnecessary_null_aware_operator_on_extension_on_nullable
+    - unnecessary_underscores
     - use_enums
     - use_truncating_division

examples/async_await/bin/get_order.dart

@@ -4,8 +4,8 @@ Future<String> createOrderMessage() async {
 }
 
 Future<String> fetchUserOrder() =>
-// Imagine that this function is more complex and slow.
-Future.delayed(const Duration(seconds: 2), () => 'Large Latte');
+    // Imagine that this function is more complex and slow.
+    Future.delayed(const Duration(seconds: 2), () => 'Large Latte');
 
 // #docregion main-sig
 Future<void> main() async {

examples/async_await/bin/get_order_sync_bad.dart

@@ -7,8 +7,8 @@ String createOrderMessage() {
 }
 
 Future<String> fetchUserOrder() =>
-// Imagine that this function is more complex and slow.
-Future.delayed(const Duration(seconds: 2), () => 'Large Latte');
+    // Imagine that this function is more complex and slow.
+    Future.delayed(const Duration(seconds: 2), () => 'Large Latte');
 
 // #docregion main-sig
 void main() {

examples/async_await/lib/practice_errors/main.dart

@@ -1,4 +1,4 @@
-// ignore_for_file: always_declare_return_types, type_annotate_public_apis
+// ignore_for_file: always_declare_return_types, type_annotate_public_apis, strict_top_level_inference
 
 // #docregion
 // Implement changeUsername here

examples/async_await/lib/practice_errors/test.dart

@@ -79,11 +79,10 @@ void passIfNoMessages(List<String> messages, Map<String, String> readable) {
   if (messages.isEmpty) {
     _result(true);
   } else {
-    final userMessages =
-        messages
-            .where((message) => readable.containsKey(message))
-            .map((message) => readable[message]!)
-            .toList();
+    final userMessages = messages
+        .where((message) => readable.containsKey(message))
+        .map((message) => readable[message]!)
+        .toList();
     print(messages);
 
     _result(false, userMessages);

examples/async_await/lib/practice_using/main.dart

@@ -1,4 +1,4 @@
-// ignore_for_file: always_declare_return_types, type_annotate_public_apis
+// ignore_for_file: always_declare_return_types, type_annotate_public_apis, strict_top_level_inference
 import 'package:examples_util/codelabs.dart';
 
 // #docregion

examples/async_await/lib/putting_together/main.dart

@@ -1,4 +1,4 @@
-// ignore_for_file: always_declare_return_types, type_annotate_public_apis
+// ignore_for_file: always_declare_return_types, type_annotate_public_apis, strict_top_level_inference
 
 // #docregion
 // Part 1

examples/async_await/lib/putting_together/test.dart

@@ -148,11 +148,10 @@ void passIfNoMessages(List<String> messages, Map<String, String> readable) {
   if (messages.isEmpty) {
     _result(true);
   } else {
-    final userMessages =
-        messages
-            .where((message) => readable.containsKey(message))
-            .map((message) => readable[message]!)
-            .toList();
+    final userMessages = messages
+        .where((message) => readable.containsKey(message))
+        .map((message) => readable[message]!)
+        .toList();
     print(messages);
 
     _result(false, userMessages);