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

Bug: webrtc:12338
Change-Id: Ifaad29ccb63b0f2f3aeefb77dae061ebc7f87e6c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227024
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34561}

sdk/objc/components/audio/RTCAudioSession+Private.h

@@ -22,8 +22,8 @@ NS_ASSUME_NONNULL_BEGIN
      */
     @property(nonatomic, readonly) int activationCount;
 
-/** The number of times |beginWebRTCSession| was called without a balanced call
- *  to |endWebRTCSession|.
+/** The number of times `beginWebRTCSession` was called without a balanced call
+ *  to `endWebRTCSession`.
  */
 @property(nonatomic, readonly) int webRTCSessionCount;
 
@@ -57,16 +57,16 @@ NS_ASSUME_NONNULL_BEGIN
 /** Configure the audio session for WebRTC. This call will fail if the session
  *  is already configured. On other failures, we will attempt to restore the
  *  previously used audio session configuration.
- *  |lockForConfiguration| must be called first.
+ *  `lockForConfiguration` must be called first.
  *  Successful calls to configureWebRTCSession must be matched by calls to
- *  |unconfigureWebRTCSession|.
+ *  `unconfigureWebRTCSession`.
  */
 - (BOOL)configureWebRTCSession:(NSError **)outError;
 
 /** Unconfigures the session for WebRTC. This will attempt to restore the
- *  audio session to the settings used before |configureWebRTCSession| was
+ *  audio session to the settings used before `configureWebRTCSession` was
  *  called.
- *  |lockForConfiguration| must be called first.
+ *  `lockForConfiguration` must be called first.
  */
 - (BOOL)unconfigureWebRTCSession:(NSError **)outError;
 

sdk/objc/components/audio/RTCAudioSession.h

@@ -209,9 +209,9 @@ RTC_OBJC_EXPORT
 /** Relinquishes exclusive access to the audio session. */
 - (void)unlockForConfiguration;
 
-/** If |active|, activates the audio session if it isn't already active.
+/** If `active`, activates the audio session if it isn't already active.
  *  Successful calls must be balanced with a setActive:NO when activation is no
- *  longer required. If not |active|, deactivates the audio session if one is
+ *  longer required. If not `active`, deactivates the audio session if one is
  *  active and this is the last balanced call. When deactivating, the
  *  AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation option is passed to
  *  AVAudioSession.
@@ -219,7 +219,7 @@ RTC_OBJC_EXPORT
 - (BOOL)setActive:(BOOL)active error:(NSError **)outError;
 
 // The following methods are proxies for the associated methods on
-// AVAudioSession. |lockForConfiguration| must be called before using them
+// AVAudioSession. `lockForConfiguration` must be called before using them
 // otherwise they will fail with kRTCAudioSessionErrorLockRequired.
 
 - (BOOL)setCategory:(NSString *)category
@@ -245,13 +245,13 @@ RTC_OBJC_EXPORT
     /** Applies the configuration to the current session. Attempts to set all
      *  properties even if previous ones fail. Only the last error will be
      *  returned.
-     *  |lockForConfiguration| must be called first.
+     *  `lockForConfiguration` must be called first.
      */
     - (BOOL)setConfiguration : (RTC_OBJC_TYPE(RTCAudioSessionConfiguration) *)configuration error
     : (NSError **)outError;
 
 /** Convenience method that calls both setConfiguration and setActive.
- *  |lockForConfiguration| must be called first.
+ *  `lockForConfiguration` must be called first.
  */
 - (BOOL)setConfiguration:(RTC_OBJC_TYPE(RTCAudioSessionConfiguration) *)configuration
                   active:(BOOL)active

sdk/objc/components/audio/RTCNativeAudioSessionDelegateAdapter.h

@@ -23,7 +23,7 @@ class AudioSessionObserver;
 
 - (instancetype)init NS_UNAVAILABLE;
 
-/** |observer| is a raw pointer and should be kept alive
+/** `observer` is a raw pointer and should be kept alive
  *  for this object's lifetime.
  */
 - (instancetype)initWithObserver:(webrtc::AudioSessionObserver *)observer NS_DESIGNATED_INITIALIZER;