More flags to parametrise generation

[RyanGlScott]

It looks like the only remaining build failures are suggestions from a newer version of hlint.

The "Use String" suggestion is probably not warranted for this package, so I'd add ignore "Use String" to HLint.hs.

I'm not sure I understand what the "Reduce duplication" suggestions mean.

[phadej]

there are code paths which looks suspiciously similar, sometimes those are valid suggestions, sometimes they aren't.

[phadej]

i.e I'd just ignore them too, can I?

[RyanGlScott]

I'd be fine with ignoring that suggestion as well, sure.

[phadej]

green.

[RyanGlScott]

Thanks, @phadej!