Fix indexing for real this time (instead of 0, use len(...) -1)

[kratsg]

Description

See #333. This is fixing it according to @lukasheinrich 's comment.

Checklist Before Requesting Reviewer

• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

• Summarize commit messages into a comprehensive review of the PR

[lukasheinrich]

Sorry for not catching this earlier

[kratsg]

Sorry for not catching this earlier

It's ok. I don't even think there's a way to enforce a test for this (especially since our tests didn't catch it). So maybe we just validate shapesys/staterror better moving forward.

[lukasheinrich]

Tbh I think the mask will enforce the right value just before returning in apply

[kratsg]

Tbh I think the mask will enforce the rift value just before returning in apply

I thought the same thing too, but I'm not fully sure... That's what I initially set it to 0 thinking it'll just be masked out anyway...

[coveralls]

Coverage remained the same at 97.714% when pulling 841dd00 on fix/indexingCombinedMods into 0fdfcc3 on master.