Update AST to the latest version, which adds support for writing SIP terms to FITS headers.
Replace existing WCS classes with SkyWcs
My understanding is that the way you want me to merge these changes in starlink_ast (once you approve them) is to merge master directly onto lsst-dev, rather than merging the ticket branch to master. If that's incorrect, please let me know what you want.
Looks good. Minor comments on pull requests. I think it's probably best to do a merge from the ticket branch as normal for now. Needs some thought.
Thank you. I fixed the things you spotted (and looked through the documentation of the new property for other spacing errors caused by copying from a PDF). I will merge from the ticket branch as I have done before.