It seems that some of the `crossref` options do not work for `pdf` formats.

I included the following in the YAML header:
```{yaml}
crossref:
  fig-title: "**Figure**"
  tbl-title: "**Table**"
  title-delim: "."
  fig-prefix: Fig.
  tbl-prefix: Table
```
When rendered to `html`, all the options work properly.

For `pdf` output, the `fig-prefix` and `tbl-prefix` were rendered as expected, but the `fig-title`, `tbl-title`, and `title-delim` were still rendered with default formats.



cscheid
2021-12-12T02:33:58Z
juliantao
bug crossref
v1.4
open
[Bug] some `crossref` options do not work for pdf format 
https://github.com/quarto-dev/quarto-cli/issues/215