Replaced copyright notice
diff --git a/src/ProtoGen/SourceGeneratorBase.cs b/src/ProtoGen/SourceGeneratorBase.cs
index 563c64a..7787d59 100644
--- a/src/ProtoGen/SourceGeneratorBase.cs
+++ b/src/ProtoGen/SourceGeneratorBase.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using Google.ProtocolBuffers.DescriptorProtos;
 using Google.ProtocolBuffers.Descriptors;