Use backticks not vertical bars to denote variables in comments

Bug: webrtc:12338
Change-Id: I89c8b3a328d04203177522cbdfd9e606fd4bce4c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228246
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34696}
diff --git a/modules/video_coding/session_info.h b/modules/video_coding/session_info.h
index dc27a64..846352a 100644
--- a/modules/video_coding/session_info.h
+++ b/modules/video_coding/session_info.h
@@ -79,7 +79,7 @@
   void InformOfEmptyPacket(uint16_t seq_num);
 
   // Finds the packet of the beginning of the next VP8 partition. If
-  // none is found the returned iterator points to |packets_.end()|.
+  // none is found the returned iterator points to `packets_.end()`.
   // `it` is expected to point to the last packet of the previous partition,
   // or to the first packet of the frame. `packets_skipped` is incremented
   // for each packet found which doesn't have the beginning bit set.