Revert "third_party/protobuf: Update to HEAD (83d681ee2c)"

third_party/protobuf/csharp/src/Google.Protobuf/InvalidProtocolBufferException.cs

 #region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
@@ skipping 43 matching lines @@
         internal static InvalidProtocolBufferException MoreDataAvailable()
         {
             return new InvalidProtocolBufferException(
                 "Completed reading a message while more data was available in the stream.");
         }
 
         internal static InvalidProtocolBufferException TruncatedMessage()
         {
             return new InvalidProtocolBufferException(
                 "While parsing a protocol message, the input ended unexpectedly " +
-                "in the middle of a field.  This could mean either that the " +
+                "in the middle of a field.  This could mean either than the " +
                 "input has been truncated or that an embedded message " +
                 "misreported its own length.");
         }
 
         internal static InvalidProtocolBufferException NegativeSize()
         {
             return new InvalidProtocolBufferException(
                 "CodedInputStream encountered an embedded string or message " +
                 "which claimed to have negative size.");
         }
@@ skipping 45 matching lines @@
                 "Use CodedInputStream.SetSizeLimit() to increase the size limit.");
         }
 
         internal static InvalidProtocolBufferException InvalidMessageStreamTag()
         {
             return new InvalidProtocolBufferException(
                 "Stream of protocol messages had invalid tag. Expected tag is length-delimited field 1.");
         }
     }
 }