Resolve "Customer First Name" and "Customer Last Name" should display empty instead of "----" in Newsletter Subscribers issue25057

[edenduong]

Description (*)

1. Resolve "Customer First Name" and "Customer Last Name" should display empty instead of "----" in Newsletter Subscribers  #25057: "Customer First Name" and "Customer Last Name" should display empty instead of "----" in Newsletter Subscribers

Fixed Issues (if relevant)

1. "Customer First Name" and "Customer Last Name" should display empty instead of "----" in Newsletter Subscribers  #25057: "Customer First Name" and "Customer Last Name" should display empty instead of "----" in Newsletter Subscribers

Manual testing scenarios (*)

1. Go to frontend, subscribe the newsletter with Guest
2. Go to backend
3. Marketing->Newsletter Subscribers
4. Check the grid

"Customer First Name" and "Customer Last Name" should display empty instead of "----"

Expected result

1."Customer First Name" and "Customer Last Name" should display empty

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

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[kalpmehta]

@edenduong Do you think removing ---- and keeping this argument tag as it is without value would also solve the issue?

[edenduong]

Hi @kalpmehta : Yes, It can solve this issue. But I think it would be better if we remove it.
Thank you .

[magento-engcom-team]

Hi @kalpmehta, thank you for the review.
ENGCOM-6144 has been created to process this Pull Request

[engcom-Alfa]

✔️ QA Passed

[m2-assistant]

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[VladimirZaets]

Covered in the scope of #25853