The bulk update request #14842 has been approved by @evazion.
create alias test_pattern -> test_card
Test pattern is a common name for test card. Our own wiki as well as Wikipedia say so.
I was trying to find the tag, which I knew we had, but "test pattern" was the only term I kept thinking of and I didn't find test card until I looked it up "test pattern" on Wikipedia and it redirected to "test card" -- we should do the same.