Support of collaboration command for full author list

[dncnwtts]

In the latest aastex version, \collaboration takes two arguments, number of authors that should be included in the collaboration before "et al." is added, and the collaboration name. I'd like it if there were a default option, such as \collaboration{all}{Collaboration Name}, that included all of the authors without manually putting the number of authors in.

It is possible to do this with a number that's much larger than the number of authors, but that ends the list as "Author_{n-1}, Author_{n}," rather than "Author_{n-1} and Author_{n}".

[augustfly]

I think this is a great suggestion. @gregschwarz do we see any issues caching this for v6.4?

[gregschwarz]

The collaboration set up is not optimal. It was a last minute add that (mostly) works so there is definitely room for improvement. I would love to have more people chime in on how they would like to see the collaboration commands done as there does not seem to be a set way. This is a good start.

[kadrlica]

Note that requiring two arguments be passed to \collaboration breaks backward compatibility with previous versions of aastex6 (where \collaboration only took one argument). If backward compatibility is desired, I would suggest that \collaboration{all}{Collaboration Name} should be the default.

I'll also add that for large survey collaborations, I currently use the same workaround as @pqrs6. However, the missing "and" and trailing comma are pretty annoying...