Delete extra newline, fix comment inconsistency

Use "userName" in the channel helper test's comment for consistency (the channel name uses "userName", the comment used "userId", fixed that)

Author: lukinovec

tests/Bootstrappers/BroadcastChannelPrefixBootstrapperTest.php

@@ -196,7 +196,7 @@ protected function formatChannels(array $channels)
     // Register a tenant broadcasting channel (almost identical to the original channel, just able to accept the tenant key)
     tenant_channel($channelName, $channelClosure);
 
-    // Tenant channel registered – its name is correctly prefixed ("{tenant}.user.{userId}")
+    // Tenant channel registered – its name is correctly prefixed ("{tenant}.user.{userName}")
     $tenantChannelClosure = $getChannels()->first(fn ($closure, $name) => $name === "{tenant}.$channelName");
     expect($tenantChannelClosure)->toBe($centralChannelClosure);
 

tests/Bootstrappers/BroadcastingConfigBootstrapperTest.php

@@ -310,7 +310,6 @@
         'broadcasting_key' => 'custom_value',
     ]);
 
-
     tenancy()->initialize($tenant);
 
     expect(config("broadcasting.connections.{$driver}.key"))->toBe('custom_value');