Validation of Email does not consider emails with double dots after domain

[constancensq]

Email validation allows the addition of students with email that has double dots after the @

Steps to reproduce:
add n/Test p/12345678 e/littleicemaiden@abc..com ay/3 d1/1330 d2/1730 d3/1600 d4/1200 d5/1100

This could be an issue if users accidentally type the wrong email.

[nus-se-bot]

Team's Response

Bug is inherited from AB3 (i.e. the current behavior is same as AB3 and we had no reason to change it because the feature applies similarly to our product)

Items for the Tester to Verify

❓ Issue response

Team chose [response.Rejected]

• I disagree

Reason for disagreement: [replace this with your reason]

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