tidy up code formatting

src/google/protobuf/compiler/csharp/csharp_helpers.cc

@@ -190,7 +190,8 @@ std::string UnderscoresToCamelCase(const std::string& input,
   // start with a digit.
   // Note: not preserving leading underscores for all otherwise valid identifiers
   // so as to not break anything that relies on the existing behaviour
-  if (result.size() > 0 && ('0' <= result[0] && result[0] <= '9') && input.size() > 0 && input[0] == '_')
+  if (result.size() > 0 && ('0' <= result[0] && result[0] <= '9')
+      && input.size() > 0 && input[0] == '_')
   {
       result.insert(0, 1, '_');
   }