asciidoctor-pdf: Missing admonition support in tables
Hi,
the following content
```
== Title
=== Section
[cols="25s,75"]
|===
| topic | comment
| title 1
a| test
NOTE: mynote
|===
````
generates an admonition icon in HTML but if I use using asciidoctor PDF 1.5.0.alpha.13 using Asciidoctor 1.5.4 the pdf does not contain any admonition boarder or icon.
I am using
```bash
asciidoctor-pdf -a pdf test_pdf.adoc
```
Is the support in asciidoctor-pdf missing or did I something wrong?