A subclass of such issues affects punctuation. For example, a straight apostrophe ' sometimes becomes an apostrophe ’ in the libxmlada package. There are several links in the smartquotes section of https://www.sphinx-doc.org/en/master/usage/configuration.html
Easy work-around: smartquotes=False in conf.py Proper fix, when possible: use the right character in the .md sources in the first place.
