From a03e341f224892eb4122dd3bf126ac50076b68c1 Mon Sep 17 00:00:00 2001
From: mrdrogdrog <mr.drogdrog@gmail.com>
Date: Tue, 23 Jun 2020 00:46:22 +0200
Subject: [PATCH] Add unique key to highlight codeblock line numbers (#254)

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>
---
 src/components/common/highlighted-code/highlighted-code.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/common/highlighted-code/highlighted-code.tsx b/src/components/common/highlighted-code/highlighted-code.tsx
index bf537809f..29fdb9c1e 100644
--- a/src/components/common/highlighted-code/highlighted-code.tsx
+++ b/src/components/common/highlighted-code/highlighted-code.tsx
@@ -48,7 +48,7 @@ export const HighlightedCode: React.FC<HighlightedCodeProps> = ({ code, language
           {
             highlightedCode
               .map((line, index) => {
-                return <span data-line-number={index + 1}/>
+                return <span key={index} data-line-number={index + 1}/>
               })
           }
         </span>