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/pc/ice_server_parsing.cc b/pc/ice_server_parsing.cc
index c1c8557..a38e28c 100644
--- a/pc/ice_server_parsing.cc
+++ b/pc/ice_server_parsing.cc
@@ -104,7 +104,7 @@
 // This method parses IPv6 and IPv4 literal strings, along with hostnames in
 // standard hostname:port format.
 // Consider following formats as correct.
-// |hostname:port|, |[IPV6 address]:port|, |IPv4 address|:port,
+// `hostname:port`, |[IPV6 address]:port|, |IPv4 address|:port,
 // `hostname`, |[IPv6 address]|, |IPv4 address|.
 static bool ParseHostnameAndPortFromString(const std::string& in_str,
                                            std::string* host,