Small improvements to generated documentation

1 files changed, 2 insertions, 2 deletions

diff --git a/doc/cpp/perf_notes.md b/doc/cpp/perf_notes.md
index 805ead3638..c87557558d 100644
--- a/doc/cpp/perf_notes.md
+++ b/doc/cpp/perf_notes.md
@@ -10,9 +10,9 @@ If message k+1 in a stream does not rely on responses from message k, it's
 possible to enable write batching by passing a WriteOptions argument to Write
 with the buffer_hint set:
 
-```c++
+~~~{.cpp}
 stream_writer->Write(message, WriteOptions().set_buffer_hint());
-```
+~~~
 
 The write will be buffered until one of the following is true:
 - the per-stream buffer is filled (controllable with the channel argument