Clean up.

src/filebrowser/plugin.ts

@@ -127,11 +127,11 @@ function activate(app: JupyterLab, manager: IServiceManager, documentManager: ID
   };
 
   // Restore the state of the file browser on reload.
-  let key = `${NAMESPACE}:cwd`;
+  const key = `${NAMESPACE}:cwd`;
   let connect = () => {
     // Save the subsequent state of the file browser in the state database.
     fbModel.pathChanged.connect((sender, args) => {
-      state.save(`${NAMESPACE}:cwd`, { path: args.newValue });
+      state.save(key, { path: args.newValue });
     });
   };
   Promise.all([state.fetch(key), app.started, manager.ready]).then(([cwd]) => {
@@ -140,10 +140,10 @@ function activate(app: JupyterLab, manager: IServiceManager, documentManager: ID
     }
     let path = cwd['path'] as string;
     return manager.contents.get(path)
-      .then(() => { fbModel.cd(path); })
-      .catch(() => { state.remove(key); });
+      .then(() => fbModel.cd(path))
+      .catch(() => state.remove(key));
   }).then(connect)
-    .catch(() => { state.remove(key).then(connect); });
+    .catch(() => state.remove(key).then(connect));
 
   each(registry.creators(), creator => { addCreator(creator.name); });