Typo in notes about command format

[nus-pe-bot]

Note from the teaching team: This bug was reported during the Part II (Evaluating Documents) stage of the PE. You may reject this bug if it is not related to the quality of documentation.

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Items with (s) after them can be used multiple times including zero times.
e.g. [t/TAG(s)] can be used as
(i.e. 0 times), t/friend , t/friend t/family etc.

The ` ` should have been t\ instead of the space.

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_{[original: nus-cs2103-AY2021S2/pe-interim#3163] [original labels: severity.VeryLow type.DocumentationBug]}

[JodyLorah]

Team's Response

It is to show that tag can be used 0 times, meaning it does not even need to have any fields typed in the command. Furthermore, putting just t/ will give an error since it must be single alphanumeric and cannot have any blank fields.

Duplicate status (if any):

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