Bug: Ampersands in the exhibit description do not display properly on exhibit cards

[VanessaVenti]

Description

Spotlight does not properly display ampersands on exhibit card descriptions. If one is typed into the exhibit description, it is displayed as & instead of "&". For example, instead of displaying "Historical & Special Collections" it displays "Historical & Special Collections" (see screenshot)

Steps to reproduce

1. Type an ampersand anywhere into an exhibit's description
2. View the description on the exhibit card checking to see how the ampersand displays

Expected behavior

Ampersand should display as "&" instead of &

[corylown]

Not sure why, but Spotlight is sanitizing the description before it's saved in the database:

spotlight/app/models/spotlight/exhibit.rb

Line 90 in 3d30849

before_save :sanitize_description, if: :description_changed?

spotlight/app/models/spotlight/exhibit.rb

Lines 151 to 153 in 3d30849

	def sanitize_description
	self.description = ::Rails::Html::FullSanitizer.new.sanitize(description)
	end

This results in & getting stored as & in the description field in the database. I'm not sure why we're doing this. The stored description will be marked unsafe and so storing the & directly in the database should be fine and then it would get properly encoded for display.