arr-init: fix bazarr API endpoint and update test

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

modules/arr-init.nix

@@ -366,12 +366,10 @@ let
 
   enabledInstances = lib.filterAttrs (_: inst: inst.enable) cfg;
 
-  mkBazarrProviderSection =
-    type: provider:
+  mkBazarrProviderSection = type: provider:
     let
       ltype = lib.toLower type;
-    in
-    ''
+    in ''
     # ${type} provider
     echo "Checking ${type} provider..."
     PROVIDER_API_KEY=$(${grep} -oP '(?<=<ApiKey>)[^<]+' ${lib.escapeShellArg "${provider.dataDir}/config.xml"})