From 919ff06445f878bdfa2791e7cc99119a08d5637f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Fri, 26 Feb 2021 11:43:54 +0100
Subject: [PATCH] style: Fix Gecko nightly warning.

---
 components/style/build_gecko.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/style/build_gecko.rs b/components/style/build_gecko.rs
index 1e93660936a..1f034cad934 100644
--- a/components/style/build_gecko.rs
+++ b/components/style/build_gecko.rs
@@ -279,7 +279,7 @@ impl<'a> BuilderWithConfig<'a> {
     fn get_builder(self) -> Builder {
         for key in self.config.keys() {
             if !self.used_keys.contains(key.as_str()) {
-                panic!(format!("Unknown key: {}", key));
+                panic!("Unknown key: {}", key);
             }
         }
         self.builder