Unexpected result when using closing backtick for hyperlinked identifiers that end with single quote

[Flupp]

With Haddock 2.25.1, when using a closing backtick for hyperlinking an identifier that ends in a single quote, the single quote seems to be considered as the closing hyperlink markup instead of the backtick. For example:

-- |
--
-- no prime
--
-- - 'foo' works
-- - `foo' works
-- - 'foo` works
-- - `foo` works
--
-- one prime
--
-- - 'foo'' works
-- - `foo'' works
-- - 'foo'` broken
-- - `foo'` broken
--
-- two primes
--
-- - 'foo''' works
-- - `foo''' works
-- - 'foo''` broken
-- - `foo''` broken
--
--  middle prime
--
-- - 'foo'bar' works
-- - `foo'bar' works
-- - 'foo'bar` works
-- - `foo'bar` works
--
-- infix, no prime
--
-- - '`foo`' works
-- - ``foo`' works
-- - '`foo`` works
-- - ``foo`` works
--
-- infix, one prime
--
-- - '`foo'`' broken
-- - ``foo'`' broken
-- - '`foo'`` broken
-- - ``foo'`` broken
--
-- infix, two primes
--
-- - '`foo''`' broken
-- - ``foo''`' broken
-- - '`foo''`` broken
-- - ``foo''`` broken
--
--  infix, middle prime
--
-- - '`foo'bar`' works
-- - ``foo'bar`' works
-- - '`foo'bar`` works
-- - ``foo'bar`` works
module MyLib where

foo = undefined

foo' = undefined

foo'' = undefined

foo'bar = undefined

results in:

[Kleidukos]

Hi, thank you for this ticket, but Haddock now lives full-time in the GHC repository! Read more at https://discourse.haskell.org/t/haddock-now-lives-in-the-ghc-repository/9576.

Let me know if you feel it is still needed, and I'll migrate it. :)

[Flupp]

I just checked with Haddock version 2.28.0 (GHC 9.10.1). With that, “one prime” and and “two primes” do work, however, “infix, one prime” and “infix, two primes” remain broken. That’s probably good enough in practice. I’ll leave it up to you to decide if this is still a relevant problem or not.