Mojom parser: Fix snippet algorithm.

mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart

Index: mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
diff --git a/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart b/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
index 9e851d3ca3e4e722e48543165d29d8775e709946..6ce4364d2d1a4da5884bf86b76f234d267415b85 100644
--- a/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
+++ b/mojo/dart/packages/_mojo_for_test_only/lib/dart_to_cpp/dart_to_cpp.mojom.dart
@@ -1331,7 +1331,7 @@ mojom_types.RuntimeTypeInfo  _initRuntimeTypeInfo() {
   // serializedRuntimeTypeInfo contains the bytes of the Mojo serialization of
   // a mojom_types.RuntimeTypeInfo struct describing the Mojom types in this
   // file. The string contains the base64 encoding of the gzip-compressed bytes.
-  var serializedRuntimeTypeInfo = "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";
+  var serializedRuntimeTypeInfo = "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";
 
   // Deserialize RuntimeTypeInfo
   var bytes = BASE64.decode(serializedRuntimeTypeInfo);