PullsAndImpacts: enable robustFit
Fixes bad PullsAndImpacts i.e. severly "overconstrained" to about +0.02/-0.0 sigma. Was introduced in 3ca8362b.
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Hi @befische ,
Thanks for the PR but I think we should not add this by default as some channels (at least bbtt and multilepton) saw other weird things happening when enabling it. Maybe we should rather have this as an opt-in, i.e. "enable only if needed" similar to how combine does it. We should, however, mention this in the next HH meeting for other groups to check :)
Would you be fine with that?
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