Editing contacts, name field bug

[yan-soon]

When editing contacts, the UG states that only alphabetical characters are allowed, however, the app allows me to edit in contacts with numbers in their name.

Steps to reproduce:

1. Type in contact edit 2 n/33333
   

Actual:

Expected:

[nus-se-bot]

Team's Response

No response provided.

Items for the Tester to Verify

❓ Issue type

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

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Reason for disagreement: [replace this with your explanation]

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