Prefer glue_data() when the data source is a list

[jennybc]

This PR is inspired by doing revdep checks for glue. I'm going to temporarily back off on the associated change in glue, just so I can release without any breakage of other packages.

But please do consider this a heads up that, in the future, glue::glue() will error when .envir is not an actual environment. .envir has always been documented to be an environment and I'd like to make that actually true.

OTOH glue_data() does officially accept something "list-ish" as .x. So I think it's a better choice for your usage.

Backstory in glue:

tidyverse/glue#308
tidyverse/glue@e2b74ff

[jennybc]

Before I rolled back the change in glue, here's what the table.glue check failure looked like for me:

https://github.com/tidyverse/glue/blob/c98f106c420d658da8010627d4a2a4d19f97d758/revdep/problems.md#tableglue

[bcjaeger]

Wow - what an incredibly thoughtful PR. The changes make sense, especially given the background you provide, and I'm happy to merge and then push the update to CRAN. Thank you!

[jennybc]

I released glue 1.7.0 today without this change and then re-introduced the change. So you can expect it to be present in glue's next release, which I have no concrete plans for. But barring an unforeseen release in the next ~2 weeks, I will consider this issue as me having given plenty of notice of the change.

This also means you can check your package in the presence of dev glue to test your own fix for the issue.

[jennybc]

At long last I am about to make a glue release. I think this PR was merged but this is not available in the CRAN version of table.glue yet? I still see it in my failed revdeps:

https://github.com/tidyverse/glue/blob/main/revdep/problems.md#table.glue

So this is a just another heads up. Some new revdeps have cropped up since I last made all the PRs, so it will take me a little while to submit. So you would be able update on CRAN before this new glue version hits and breaks table.glue.

[bcjaeger]

Sorry about that. Yes, version 0.0.4 is ready, but I forgot to submit it after merging this PR. I just submitted it to CRAN. Thank you for following up and for all you've done with glue!