Rubocop updates (#1118)

* Minimal code style enforcement

* Formatting and lint code updates (no change in functionality)

app/models/invite_code.rb

@@ -16,10 +16,10 @@ class InviteCode < ApplicationRecord
 
   private
 
-  def generate_token
-    loop do
-      self.token = SecureRandom.hex(4)
-      break token unless self.class.exists?(token: token)
+    def generate_token
+      loop do
+        self.token = SecureRandom.hex(4)
+        break token unless self.class.exists?(token: token)
+      end
     end
-  end
 end