[darcs-devel] [patch1899] turn RepoPatch into a constraint synonym (and 1 more)

[Ganesh Sittampalam]

Ganesh Sittampalam <ganesh at earth.li> added the comment:

Just to note that one practical consequence of this change is that
if you really need a PrimPatch constraint but omit it, instead
of the type-checker telling you that, you get a stream of messages
about the individual classes. You have to be paying a bit of 
attention to realise that the right fix is to add PrimPatch rather
than writing out a huge constraint by hand.

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