Unit tests fail

[fendor]

Expected Right "```haskell\nhead :: [a] -> a\n```\nExtract the first element of a list, which must be non-empty.\n\n[More info](https://hackage.haskell.org/package/base/docs/Prelude.html#v:head)" 
but got  Right "```haskell\nhead :: [a] -> a\n```\n<math>. Extract the first element of a list, which must be\nnon-empty.\n\n[More info](https://hackage.haskell.org/package/base/docs/Prelude.html#v:head)"

change can be observed in hoogle as well https://hoogle.haskell.org/?hoogle=head
So, I assume hoogle output changed somehow. Updating the test-case should be enough.