AO3-6244 Fixed underline added to some links in preface on hover (#4927) #4635

Job	Run time
rake db:otwseed	1m 18s
rspec spec/controllers	11m 17s
rspec spec/models	5m 33s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 55s
cucumber features/admins	5m 56s
cucumber features/bookmarks	5m 2s
cucumber features/collections	5m 53s
cucumber features/comments_and_kudos	6m 46s
cucumber features/gift_exchanges	7m 9s
cucumber features/importing	2m 44s
cucumber features/other_a	10m 8s
cucumber features/other_b	6m 3s
cucumber features/prompt_memes_a	4m 13s
cucumber features/prompt_memes_b	4m 0s
cucumber features/prompt_memes_c	5m 3s
cucumber features/search	7m 2s
cucumber features/tag_sets	3m 41s
cucumber features/tags_and_wrangling	6m 7s
cucumber features/users	4m 59s
cucumber features/works	13m 1s
	2h 3m 50s

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