squareroot not rendering

[dustinfarris]

Environment

• Elixir & Erlang/OTP versions (elixir --version): 1.12.3
• Operating system: macos monterey
• How have you started Livebook (mix phx.server, livebook CLI, Docker, etc): mix phx.server and fly.io
• Livebook version (use git show if running with mix): 6bf2f9c
• Browsers that reproduce this bug (the more the merrier): safari, firefox, chrome
• Include what is logged in the browser console: nothing relevant
• Include what is logged to the server console: nothing relevant

Current behavior

katex is not rendering the square root symbol

Expected behavior

should render square root symbol

[josevalim]

I did some investigation. Everything is being parsed correctly. However, the sqrt is rendered using a svg, the svg, for some reason, is not appearing in the DOM. @jonatanklosko, could it be that we are pruning tags after the katex rendering? Maybe we can do it before or not really feasible?

[jonatanklosko]

@josevalim correct! We should render the math tags after sanitizing, since we trust katex with that.