Mojom parser: Fix snippet algorithm.

mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart

Index: mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart
diff --git a/mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart b/mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart
index cf15080c56b7413d18db5a8e4323e96ae0d61863..53422cb4690d02249c14f320dbb5fb6aec8d99cb 100644
--- a/mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart
+++ b/mojo/dart/packages/_mojo_for_test_only/lib/sample/sample_interfaces.mojom.dart
@@ -2332,7 +2332,7 @@ 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);