Simon Peyton Jones authored Aug 24, 2020 and Marge Bot committed Aug 25, 2020

This patch mainly just replaces use of
    XRec p (IdP p)
with
    LIdP p

One slightly more significant change is to parameterise
HsPatSynDetails over the pass rather than the argument type,
so that it's uniform with HsConDeclDetails and HsConPatDetails.

I also got rid of the dead code GHC.Hs.type.conDetailsArgs

But this is all just minor refactoring. No change in functionality.