If you include a wide character, such as a fancy quote, in a [[graphviz|plugins/graphviz]] source file for use with the file parameter to the graph directive, you get the following error:

```
[[!graph Error: Wide character in subroutine entry at /usr/share/perl5/IkiWiki/Plugin/graphviz.pm line 57.]]
```

Note, this is what renders on the resulting wiki page, not something that you see on the command line. 
Since dot supports UTF-8, I would expect this to work.  

I'm unsure if this is a bug in the graphviz plugin, or in the perl module it depends upon, but figured I would start here. 

> This reminds me of [[bugs/table can not deal with Chinese ]] *—[[Jon]], 2020-11-02*
