style(rubocop): fix all safe auto correctable offenses

spec/app/models/user_spec.rb

@@ -1,7 +1,6 @@
-require 'rails_helper'
+require "rails_helper"
 
 describe User do
-
   context "model" do
     subject(:user) { create(:user) }
 
@@ -13,24 +12,23 @@ describe User do
 
   context ".authenticate" do
     it "should not authenticate users with invalid emails" do
-      expect { User.authenticate('nothing@nothing.com', 'hello') }.to raise_error(Postal::Errors::AuthenticationError) do |e|
-        expect(e.error).to eq 'InvalidEmailAddress'
+      expect { User.authenticate("nothing@nothing.com", "hello") }.to raise_error(Postal::Errors::AuthenticationError) do |e|
+        expect(e.error).to eq "InvalidEmailAddress"
       end
     end
 
     it "should not authenticate users with invalid passwords" do
       user = create(:user)
-      expect { User.authenticate(user.email_address, 'hello') }.to raise_error(Postal::Errors::AuthenticationError) do |e|
-        expect(e.error).to eq 'InvalidPassword'
+      expect { User.authenticate(user.email_address, "hello") }.to raise_error(Postal::Errors::AuthenticationError) do |e|
+        expect(e.error).to eq "InvalidPassword"
       end
     end
 
     it "should authenticate valid users" do
       user = create(:user)
       auth_user = nil
-      expect { auth_user = User.authenticate(user.email_address, 'passw0rd') }.to_not raise_error
+      expect { auth_user = User.authenticate(user.email_address, "passw0rd") }.to_not raise_error
       expect(auth_user).to eq user
     end
   end
-
 end