None code with bold or italic in syntax highlighter

set interface eth0 comments Outside (n7k1)
set interface eth0 state on
set interface eth0 ipv4-address 192.168.1.4 mask-length 24

You could create a “custom” lexer, but isn’t that format bash, shell, systemd? Adding one of these leads to at least some formats.

You can’t work with markdown fat and italic inside of code brackets, because they are interpreted as pre tags and will be shown. Must be some css in the end.