Provide a way to leave code marks (when there’s no content after them)

[hanspagel]

Related issues:

1. Unable to break out of code mark tiptap#514
2. Inline code escaping [shift+enter] doesn't work tiptap#660

The original issue suggests Shift+Enter (what I used for the failing test), I’m not sure this is intuitive enough though. It would probably be more intuitive to leave the code mark with arrow keys, even if there’s no content after them.

If you think that’s a better solution, you can alter the test to look like this:

.type('`Example`{leftarrow}{rightarrow}{rightarrow}Text')