Short captions possible via lua filter

[joelostblom]

@tompollard I saw that you are looking for a way to add short captions, so I wanted to bring your attention to this lua-filter, which I am currently using for my thesis and that is working really well so far. The syntax is as follows.

![The long caption](foo.png){short-caption="a short caption"} 

It is compatible with other pandoc extensions such as pandoc-crossref mentioned in #68.

[tompollard]

good to know, thanks @joelostblom! it's been a while since i looked at this repo. would be good to incorporate this suggestion, as well as #92

[maawoo]

I second this approach of using the short-caption lua filter.
I'm using the pandoc-fignos and -tablenos tag feature so that figures and tables in my appendix appear as "A-1", "A-2" , "B-1" and so on for each appendix. For some reason this doesn't work when I'm using the default --filter=pandoc-shortcaption. The short-caption lua filter works, however 👍🏻