## Summary When XDG directories are used, location of `ghci_history` file is improper. `getAppDataFile` in `ghc/GHCi/UI.hs` introduced by !7010 and ee5c4f9d05fab41f53364dc18d30932034e6ada6 behaves differently from its comment and the behaviour in its comments is not correct. ## Steps to reproduce Use `ghci` without an existing `~/.ghc` and do some calculations, and now a `ghci_history` is emplaced in `$XDG_CONFIG_HOME/ghc` or `~/.config/ghc`. ## Expected behavior | file | XDG location | | ------ | ------ | | `ghci_history` | $XDG_DATA_HOME | | `ghci.conf` | $XDG_CONFIG_HOME | ## Environment * GHC version used: 9.2.8, 9.4.8, 9.6.3, 9.8.1 * Operating System: Linux