third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.cc

 // 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
 // notice, this list of conditions and the following disclaimer.
@@ skipping 56 matching lines @@
     // (We don't skip "just whitespace" lines, either.)
     for (std::vector<string>::iterator it = lines.begin(); it != lines.end(); ++it) {
         string line = *it;
         if (line.empty()) {
             last_was_empty = true;
         } else {
             if (last_was_empty) {
                 printer->Print("///\n");
             }
             last_was_empty = false;
-            printer->Print("/// $line$\n", "line", *it);
+            printer->Print("///$line$\n", "line", *it);
         }
     }
     printer->Print("/// </summary>\n");
 }
 
 template <typename DescriptorType>
 static void WriteDocCommentBody(
     io::Printer* printer, const DescriptorType* descriptor) {
     SourceLocation location;
     if (descriptor->GetSourceLocation(&location)) {
@@ skipping 17 matching lines @@
 }
 
 void WriteMethodDocComment(io::Printer* printer, const MethodDescriptor* method) {
     WriteDocCommentBody(printer, method);
 }
 
 }  // namespace csharp
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google