How do I remove the spellcheck block when editing files on GitHub?

[Korb]

GitHub uses that HTML attribute to tell browsers to disable their spellcheckers.
https://bugzilla.mozilla.org/show_bug.cgi?id=1996410#c3

[uBlock-user]

Add github.com##div.cm-content[spellcheck]:remove-attr(spellcheck) to my filters.