Fix typo in omitPlatform documentation

Change-Id: Id490a6b051b0ef74cae709157d4ae537495e9583
Reviewed-on: https://dart-review.googlesource.com/c/90680
Auto-Submit: Peter von der Ahé <ahe@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
diff --git a/pkg/front_end/lib/src/api_prototype/compiler_options.dart b/pkg/front_end/lib/src/api_prototype/compiler_options.dart
index 85222be..5211c44 100644
--- a/pkg/front_end/lib/src/api_prototype/compiler_options.dart
+++ b/pkg/front_end/lib/src/api_prototype/compiler_options.dart
@@ -161,8 +161,8 @@
   /// Dumped data is printed in stdout.
   bool debugDump = false;
 
-  /// Whether to exclode the platform when serializing the result from a
-  /// 'fasta compile' run.
+  /// Whether to omit the platform when serializing the result from a `fasta
+  /// compile` run.
   bool omitPlatform = false;
 
   /// Whether to set the exit code to non-zero if any problem (including