Normalize string concat

server/joystream/index.ts

@@ -139,7 +139,7 @@ const addBlockRange = async (
   )) as Option<ActiveEraInfo>
 
   for (let i = startBlock; i < endBlock; i++) {
-    console.log('[Joystream] Processing block ' + i)
+    console.log(`[Joystream] Processing block ${i}`)
 
     const hash = await getBlockHash(api, i)
     const blockEra = (await api.query.staking.activeEra.at(