fix: copy and paste custom-emoji

[patak-dev]

Reference:

• fix: get custom emoji id from title attribute #1871

@cyberalien it looks like when we copy and paste, there is no title in the attributes and we are instead adding a alt that has the full :name:

This PR fixes copy and paste, but I don't know if this is correct long term. We also are creating here a custom emoji without a title but this one has a emoji-data-id

Looks like the emoji-data-id is lost on copy and paste.
We could still merge this one as a patch.

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[cyberalien]

With all this weird behaviour going on, maybe it would be better not to assume that value starts/ends with :?

Custom emojis can't have double ::, so it would be safe to just wrap whole chain of attributes, get string, remove first/last entry with regex, which would work the same regardless of which attribute it came from.

Something like this:

return `:${(input.attributes['data-emoji-id'] ?? input.attributes.title ?? input.attributes.alt ?? '').replace(/^:/, '').replace(/:$/,'')}:`

[patak-dev]

Sounds good! I'll change it and merge tomorrow when I'm back