Fix bind wild text with only tail

[tefra]

📒 Description

Fix issue when node has a tail but no text.

<doc><b/>text<a/>text<d/>text<a/></doc>

In this scenario we need to prepend None in the list otherwise tail becomes text

🔗 What I've Done

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💬 Comments

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🛫 Checklist

• Updated docs
• Added unit-tests
• Sample tests pass
• W3C tests pass

[sonarcloud]

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