You could add this yourself using highlight.js - http://softwaremaniacs.org/soft/highlight/en/
Just add the script to your page via your theme.
Alternatively, the Markdown editor includes this same script: https://github.com/svivian/q2a-markdown-editor
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
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May 7, 2020: Q2A 1.8.4 released!