Phone number does not + sign which is important for country codes

[songivan00]

Country codes are very common especially if you have friends from overseas and a + sign is essential when dealing with these phone number. Phone numbers should allow for the + sign

Steps to reproduce: edit 3 p/+65938489348

Expected output: Contact at index 3 is edited

Actual output: Shown in the picture below

[nus-se-script]

Team's Response

Thanks for the suggestion, this is an overzealous input validation.

Items for the Tester to Verify

:question: Issue type

Team chose [type.FeatureFlaw] Originally [type.FunctionalityBug]

• [x] I disagree

Reason for disagreement: I still believe that this is still a feature flaw more than a functionality bug because it is a problem with how the feature is designed.

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