From f9c3728b7e2b7f9fffa300faeb07adc5dd4554bf Mon Sep 17 00:00:00 2001
From: Julian Tescher <jatescher@gmail.com>
Date: Sun, 27 Feb 2022 17:51:41 -0500
Subject: [PATCH] fix otlp external example lint

---
 examples/external-otlp-tonic-tokio/src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/external-otlp-tonic-tokio/src/main.rs b/examples/external-otlp-tonic-tokio/src/main.rs
index 97e7fd5947..db5634f88b 100644
--- a/examples/external-otlp-tonic-tokio/src/main.rs
+++ b/examples/external-otlp-tonic-tokio/src/main.rs
@@ -47,7 +47,7 @@ fn init_tracer() -> Result<sdktrace::Tracer, TraceError> {
         .map(|(name, value)| {
             let header_name = name
                 .strip_prefix(HEADER_PREFIX)
-                .map(|h| h.replace("_", "-"))
+                .map(|h| h.replace('_', "-"))
                 .map(|h| h.to_ascii_lowercase())
                 .unwrap();
             (header_name, value)