Extra whitespace case when adding a contact.

[nus-se-script]

When keying in a new contact, extra whitespaces are still taken as the input, resulting in there being 2 contacts possibly having the same name despite the names being the same if the whitespace was trimmed.

Steps to replicate:

1. add n/Alex  Yeoh p/99272758 e/alexyeoh@example.com tele/@alexyeoh t/fulltime c/cs1231s

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_{[original: nus-cs2103-AY2324S1/pe-interim#1600] [original labels: severity.Low type.FeatureFlaw]}

[PohSayKeong]

Team's Response

Similar issue where we should have considered them as duplicate names.

Duplicate status (if any):

Duplicate of #5024