Apply Layout/LineLength rubocop rule

Note we're excluding a few files:

* Configuration files that weren't generated by us
* Migration files that weren't generated by us
* The Gemfile, since it includes an important comment that must be on
  the same line as the gem declaration
* The Budget::Stats class, since the heading statistics are a mess and
  having shorter lines would require a lot of refactoring

config/initializers/devise-security.rb

@@ -63,7 +63,11 @@ module Devise
         if !new_record? && !encrypted_password_change.nil? && !erased?
           dummy = self.class.new
           dummy.encrypted_password = encrypted_password_change.first
-          dummy.password_salt = password_salt_change.first if respond_to?(:password_salt_change) && !password_salt_change.nil?
+
+          if respond_to?(:password_salt_change) && !password_salt_change.nil?
+            dummy.password_salt = password_salt_change.first
+          end
+
           errors.add(:password, :equal_to_current_password) if dummy.valid_password?(password)
         end
       end