Fix affiliation bug

[cthoyt]

There were two issues in the prepare-affiliatons.lua script

1. Somehow during the squash/merge process, the part where it got applied in the pdf and preprint configurations got lost. This adds them back!
2. This PR makes it more robust for string format for affiliation lists. I'm not sure if this was actually an issue before, but I updated the example PDF to contain one of these examples just to be sure.

[arfon]

@tarleb – would you mind taking a look at this? Unfortunately the current build of Inara is broken for JOSS: openjournals/joss-reviews#6917 (comment)

[cthoyt]

I'm thinking it might be useful to add the make test into the CI pipeline to help us be more confident in adding changes in the future, too

see #78

[tarleb]

I'm thinking it might be useful to add the make test into the CI pipeline to help us be more confident in adding changes in the future, too

We do that already as part of the build pipeline.

[cthoyt]

@tarleb ah, I see this! perhaps splitting it out into its own chunk would be good, since the image builder workflow fails for PRs since I don't have credentials for dockerhub built in

[tarleb]

See #70

[tarleb]

Why this change?

[cthoyt]

It appears that we're supposed to be supporting both flavors of affiliation strings, so I wanted to make sure that the example paper reflected one of each way

[xuanxu]

@arfon version 1.1.1 is deployed with a fix, build should work now 🤞

[tarleb]

Thank you, LGTM. There's a currently a merge conflict, this can be merged after the rebase.