Codeblocks for shell session

Technical documents often include outputs of shell script. For a while, I have been using the same language code shell for shell output, which usually returns incorrect syntax highlighting. The wrongness varies from parser-to-parser.

$ echo "this is not perfect"
"this is not perfect"

Turns out, codeblocks for shell-session is a thing!

$ echo "this is more accurate!"
"this is more accurate!"