bump linter

This is the candidate for the HEAD of the linter SDK sub-tree.

Change-Id: If81b785cb53eed154d1376ebd42b3f0459800361
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/320704
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>
Reviewed-by: Alexander Aprelev <[email protected]>
Commit-Queue: Phil Quitslund <[email protected]>

Author: pq

DEPS

@@ -151,7 +151,7 @@ vars = {
   "intl_rev": "5d65e3808ce40e6282e40881492607df4e35669f",
   "json_rpc_2_rev": "509f71eef90ec5afb5486b69dab7fed97b9f1eef",
   "leak_tracker_rev": "098bafcf99a5220e3c352d895d991e163568ee03", # b/292240713
-  "linter_rev": "9a4bc7910d1ea2660deadae4c212776e9cf6212e", # disable rev_sdk_deps.dart
+  "linter_rev": "7f40f112f54124e8dbfdc1e5da048643ae019b9e", # disable rev_sdk_deps.dart
   "lints_rev": "54cd7a033881ccfd9ec66133bf9a4f128870cb9e",
   "logging_rev": "521498757ed3eeae151c2d4796404e8947baa04c",
   "markdown_rev": "faabb1ab9adc076a2df2349a0c8b939c92f70ca7",

pkg/dds/lib/src/dap/adapters/dart.dart

@@ -1096,7 +1096,7 @@ abstract class DartDebugAdapter<TL extends LaunchRequestArguments,
   /// If no message could be extracted, returns the whole original error.
   String extractEvaluationErrorMessage(String rawError) {
     final match = _evalErrorMessagePattern.firstMatch(rawError);
-    final shortError = match != null ? match.group(1)! : null;
+    final shortError = match?.group(1);
     return shortError ?? rawError;
   }
 
@@ -1105,7 +1105,7 @@ abstract class DartDebugAdapter<TL extends LaunchRequestArguments,
   /// If no message could be extracted, returns the whole original error.
   String extractUnhandledExceptionMessage(String rawError) {
     final match = _exceptionMessagePattern.firstMatch(rawError);
-    final shortError = match != null ? match.group(1)! : null;
+    final shortError = match?.group(1);
     return shortError ?? rawError;
   }