Added appropriate comma within comment.

Closes #35685
https://github.com/dart-lang/sdk/pull/35685

GitOrigin-RevId: 25e6bca8cb266e0922062ca55228eec06467b110
Change-Id: I17318554d6114e3ec030884afb3edd0a7d899252
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/89980
Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
diff --git a/sdk/lib/developer/developer.dart b/sdk/lib/developer/developer.dart
index 6c3fa82..c446fdf 100644
--- a/sdk/lib/developer/developer.dart
+++ b/sdk/lib/developer/developer.dart
@@ -30,7 +30,7 @@
 /// Returns the value of [when]. Some debuggers may display [message].
 ///
 /// NOTE: When invoked, the isolate will not return until a debugger
-/// continues execution. When running in the Dart VM the behaviour is the same
+/// continues execution. When running in the Dart VM, the behaviour is the same
 /// regardless of whether or not a debugger is connected. When compiled to
 /// JavaScript, this uses the "debugger" statement, and behaves exactly as
 /// that does.
diff --git a/sdk/lib/isolate/isolate.dart b/sdk/lib/isolate/isolate.dart
index 6e43fb7..6a737fe 100644
--- a/sdk/lib/isolate/isolate.dart
+++ b/sdk/lib/isolate/isolate.dart
@@ -40,7 +40,7 @@
  *
  * An `Isolate` object is a reference to an isolate, usually different from
  * the current isolate.
- * It represents, and can be used control, the other isolate.
+ * It represents, and can be used to control, the other isolate.
  *
  * When spawning a new isolate, the spawning isolate receives an `Isolate`
  * object representing the new isolate when the spawn operation succeeds.