Specify perl for fenced blocks in markdown

[mrsdizzie]

I notice in Neovim that code blocks in hover definitions don't have any syntax highlighting, yet in VS Code they are syntax highlighted. It looks like the markdown PerlNavigator sends back for these has fenced code blocks but with no language specified.

Maybe VS Code uses the language of the file open to automatically highlight the code blocks? Would it be possible to default to using ```perl for these? If so, injected syntax highlighting should work in Neovim.

Currently in neovim:

The same hover in VS Code:

Thanks!