Use backticks not vertical bars to denote variables in comments for /modules/video_coding

Bug: webrtc:12338
Change-Id: Ia8a9adea291d594e4f59a6a1203a7bfb0758adac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227165
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34684}
diff --git a/modules/video_coding/fec_controller_default.cc b/modules/video_coding/fec_controller_default.cc
index 827c853..88315a8 100644
--- a/modules/video_coding/fec_controller_default.cc
+++ b/modules/video_coding/fec_controller_default.cc
@@ -125,17 +125,17 @@
     // Get the FEC code rate for Delta frames (set to 0 when NA).
     delta_fec_params.fec_rate =
         loss_prot_logic_->SelectedMethod()->RequiredProtectionFactorD();
-    // The RTP module currently requires the same |max_fec_frames| for both
+    // The RTP module currently requires the same `max_fec_frames` for both
     // key and delta frames.
     delta_fec_params.max_fec_frames =
         loss_prot_logic_->SelectedMethod()->MaxFramesFec();
     key_fec_params.max_fec_frames =
         loss_prot_logic_->SelectedMethod()->MaxFramesFec();
   }
-  // Set the FEC packet mask type. |kFecMaskBursty| is more effective for
+  // Set the FEC packet mask type. `kFecMaskBursty` is more effective for
   // consecutive losses and little/no packet re-ordering. As we currently
   // do not have feedback data on the degree of correlated losses and packet
-  // re-ordering, we keep default setting to |kFecMaskRandom| for now.
+  // re-ordering, we keep default setting to `kFecMaskRandom` for now.
   delta_fec_params.fec_mask_type = kFecMaskRandom;
   key_fec_params.fec_mask_type = kFecMaskRandom;
   // Update protection callback with protection settings.