Fix specs

Author: dorner

spec/system/log_in_system_spec.rb

@@ -34,7 +34,7 @@
       fill_in "user_email", with: "deactivated@example.com"
       fill_in "user_password", with: DEFAULT_USER_PASSWORD
       find('input[name="commit"]').click
-      expect(page).to have_content("Invalid Email or password")
+      expect(page).to have_content("Invalid email or password")
     end
   end
 

spec/system/sign_in_system_spec.rb

@@ -14,7 +14,7 @@
       fill_in "Password", with: 'invalid_password'
       click_button "Log in"
 
-      expect(page).to have_content('Invalid Email or password.')
+      expect(page).to have_content('Invalid email or password.')
     end
   end