fix: event shorthand regex breaking events if attribute value matches event shorthand writing

[rokyed]

event shorthand regex breaking events if attribute value matches event shorthand writing

Description

Current regex hits even values of the attributes when it's not supposed to.

Additional context

I have documented it more here: #267

Problematic REGEX:

I fixed it with this:

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What is the purpose of this pull request?

• Bug fix
• New feature
• Documentation update
• Other

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