Replaced copyright notice
diff --git a/src/ProtoGen/SourceGenerators.cs b/src/ProtoGen/SourceGenerators.cs
index c775e41..df0aff6 100644
--- a/src/ProtoGen/SourceGenerators.cs
+++ b/src/ProtoGen/SourceGenerators.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using Google.ProtocolBuffers.Descriptors;