Extra space in name should be handled as duplicates

[LiHaixin000]

The user John Doe accidentally typed an extra space in between. In this case, John Doe and John Doe are likely the same person because of the typo. Ideally, the app should be able to distinguish that they are actually duplicate entries and prevent John Doe to be inserted. Step to reproduce: add n/John Doe p/98765432 e/johnd@example.com a/John street, block 123, #01-01 x/123 add n/John Doe p/98765432 e/johnd@example.com a/John street, block 123, #01-01 x/123

[soc-se-bot]

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