beets: small passthru reformatting

pkgs/tools/audio/beets/common.nix

@@ -232,25 +232,27 @@ python3Packages.buildPythonApplication {
     env EDITOR=true "$out/bin/beet" config -e
   '';
 
-  passthru.plugins = allPlugins;
-
-  passthru.tests.gstreamer =
-    runCommand "beets-gstreamer-test"
-      {
-        meta.timeout = 60;
-      }
-      ''
+  passthru = {
+    plugins = allPlugins;
+    tests = {
+      gstreamer =
+        runCommand "beets-gstreamer-test"
+          {
+            meta.timeout = 60;
+          }
+          ''
             set -euo pipefail
             export HOME=$(mktemp -d)
             mkdir $out
 
             cat << EOF > $out/config.yaml
-        replaygain:
-          backend: gstreamer
-        EOF
-
+            replaygain:
+              backend: gstreamer
+            EOF
             ${beets}/bin/beet -c $out/config.yaml > /dev/null
-      '';
+          '';
+    };
+  };
 
   meta = {
     description = "Music tagger and library organizer";