I'd like there to be an option to have code blocks be line wrapped. Maybe a check box for it in Rendering -> "Syntax highlighted code block" next to "Show line numbers" etc.?

If I try hard enough I can dig through the css files in Contents/Resources/Prism/themes and change "white-space: pre;" to "white-space: pre-wrap;", but doing so breaks the code signature of the app. And that's not a very n