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/audio_coding/acm2/acm_receiver.h b/modules/audio_coding/acm2/acm_receiver.h
index 9963603..18b662a 100644
--- a/modules/audio_coding/acm2/acm_receiver.h
+++ b/modules/audio_coding/acm2/acm_receiver.h
@@ -180,7 +180,7 @@
   // of NACK list are in the range of [N - `max_nack_list_size`, N).
   //
   // `max_nack_list_size` should be positive (none zero) and less than or
-  // equal to |Nack::kNackListSizeLimit|. Otherwise, No change is applied and -1
+  // equal to `Nack::kNackListSizeLimit`. Otherwise, No change is applied and -1
   // is returned. 0 is returned at success.
   //
   int EnableNack(size_t max_nack_list_size);
diff --git a/modules/audio_coding/acm2/audio_coding_module.cc b/modules/audio_coding/acm2/audio_coding_module.cc
index d629139..8ba1b9f 100644
--- a/modules/audio_coding/acm2/audio_coding_module.cc
+++ b/modules/audio_coding/acm2/audio_coding_module.cc
@@ -229,7 +229,7 @@
     const InputData& input_data,
     absl::optional<int64_t> absolute_capture_timestamp_ms) {
   // TODO(bugs.webrtc.org/10739): add dcheck that
-  // |audio_frame.absolute_capture_timestamp_ms()| always has a value.
+  // `audio_frame.absolute_capture_timestamp_ms()` always has a value.
   AudioEncoder::EncodedInfo encoded_info;
   uint8_t previous_pltype;
 
@@ -333,7 +333,7 @@
   MutexLock lock(&acm_mutex_);
   int r = Add10MsDataInternal(audio_frame, &input_data_);
   // TODO(bugs.webrtc.org/10739): add dcheck that
-  // |audio_frame.absolute_capture_timestamp_ms()| always has a value.
+  // `audio_frame.absolute_capture_timestamp_ms()` always has a value.
   return r < 0
              ? r
              : Encode(input_data_, audio_frame.absolute_capture_timestamp_ms());